• update to 2.5.0

ChangeLog:

Bugs fixed:

• Handle non-ASCII, non-UTF8 filenames in .cvsignore files.
• ExternalBlobGenerator: Don't fail if no revisions are needed for a file.
• Fix the handling of symbol-matching regexps that include "|".
• Handle excluded paths under Attic directories, too.
• cvs2git: fix logging in process_post_commit().
• Prefer to break internal cycles at the *largest* timestamp gaps.
• Don't try to delete a supposed "revision 1.1" if it has a predecessor.
  
  Improvements and output changes:
• Various small documentation fixes and improvements.
• Make cvs2xxx runnable under PyPy.
• Avoid some allusions to Subversion when converting to another VCS.
• Use tempfile.mkdtemp() to choose the location for temporary files.
• Write all progress information to stderr rather than stdout.
• Write cvs2git and cvs2bzr output to stdout by default.
• Improve build reproducibility by respecting $SOURCE_DATE_EPOCH.
• cvs2git: don't add so much useless metadata to symbol commits.
• cvs2git: allow a file to be set executable in Git via "svn:executable"
  
  Miscellaneous:
• Use "co --version" rather than the deprecated "co -V".