2008-08-22: 0.10
	- The stats format provides new information about the number of
	derivations (global and avg per node).
	- Improved the depxml format to emit clusters and nodes before
	being referenced
	- Extended the depxml format with the notion of 'Mandatory edge'
	which is an edge shared by all derivations attached to its source
	node. In that case, we can avoid to mention the list of all the
	derivations going through the edge, because we can retrieve it on
	the source node. This may be a saving for some very large forests.
	- Now use a specific XML output procedure for dep.xml rather than the
	  slow XML::Generator.
	- A cleaner handling of dependencies. Still to be properly checked.
	  Should be more efficient.
	- Modifications to take into account the addition of an hypertag
	  attached to derivations. The two XML formats for derivations and
	  dependencies are therefore modified.
	  For DerXML, each <deriv> may now include an <hypertag> element, itself
	  including a Feature Structure.
	  For DepXML, a similar <hypertag> element is added that refers a set of
	  derivations and a single op, and includes a Feature Structure.
	- Various modifs for a more efficient handling of large forest. In
	  particular, the 'name' attribute of depxml element <deriv> becomes
	  'names' to represent more compactly the set of derivations that cross
	  some edge, for the same span, target_op and source_op

2007-07-11: 0.09
	- Fixed a small bug in feature structure parser.
	- Added a token field to Op, to differenciate lex and truelex
	  coming from the lexer. Op.lex is lexer.truelex and Op,token is
	  lexer.lex. Replacing Op.lex by Op.truelex would have implied too
	  many modifications !
	- fixed bugs on scope and initialization of some variables,
	  inducing problems when used in a persistent way through parsed.
	- fixed small bug in fs parsing.
	- Deep rewriting of LP/Parser.pm to avoid exponential explosion
	  due to Parse::RecDescent.
	- Modified graph appearance.
	- Added tests + doc
	- Fixed parsing problem with anonymous shared parts
	- Fixed problem of bad affectation for the source of a dependency
	  in presence of a lexical. Example: "Il lui parle de Paul" where
	  both "lui" and "de Paul" are distinct prepargs but where "de
	  Paul" was seen as a kind of modifier of lexical coanchor "lui".
	  More generaly, more precaution should be taken when rerouting
	  dependencies from anchor to lexical coanchors.
	- version number now only specified in Forest.pm
	- In relation with modif in DyALog on forest.c: modification to
	  have a notion of anonymous shared parts in a forest.
	- Fixed bugs in computation of info.
	- Updated to take into account view info (to count derivations).
	- Transformed ERROR into WARNING on redefined inlined parts (but
	  should rather investigate why DyALog can emit forest with
	  redefinition of some inlined parts)
	- Added Info::Writer to count derivations
	
2006-12-08: 0.08
	- Fixed a few bugs, including missing id on anchor op.
	- Completed to be able to take XML Derivation forests as input to
	  forest_convert.pl
	- Added input option to read XML DEP format (-f xmldep)
	- Complete rewriting in order to be able to read XML DEP format.
	- XML DEP format provides more information, in order to rebuild a
	  shared derivation forest from a shared dependency forest. There
	  are still some points to refine in relation with lexicals and
	  epsilons (no target_op).
	- Tried to fixed autoconf wrt the use of strdupa. Maybe should try
	  to avoid strdup !
	- Added missing return info in deriv_signature functions
	- Tried to fix algorithmic issues arising when dealing with large
	  forests with a lot of duplicate ambiguities (spurious
	  ambiguities).
	- Slight modification of the formula for the ambiguity ratio
	- Dependencies relative to a coanchor are now attached to the
	  coanchor rather to the anchor of the tree.
	- Updated verbose!anchor pattern for extra argument (used for
	  hypertag)

2006-03-31: 0.07
	- Spurious ambiguities should now be removed from forests.
	- Fixed coherence problems in module names

2006-03-22: 0.06
	- Fixed nasty bug, coming from a confusion between the derivs
	  attached to nodes (stored on source nodes) and the derivs
	  attached to edges (stored to target nodes).

2005-11-03: 0.05
	- Yesno forest mode now returns 'Partial' when success in robust
	  parsing mode.
	- Derivation and dependency forests now indicate if parsing was
	  done in robust parsing mode.
	- Handling of epsilon lexicals in forests (resulting from skipping
	  actions)
	- Updated to return span for for each edge in a derivation
	  <edge ...>
	     <deriv name=" " span=" "/>
	     ...
	  </edge>
	- Changed graphic style to display dependency forests
	- Completed derivations to dependencies conversion to get a better
	  idea of existing ambiguities.
	- Enriched info present in shared dependency forest to be closer
	  from shared derivation forests.
	- Fixed bug to get URLs in dependency output
	- Added lemma information in shared forests
	- Rewriting of loops for handling dependencies
	
2004-04-08: 0.04
	
2000-08-18: 0.01
	- original version; created by h2xs 1.20 with options
		-A -X -n forest_utils
