gitdirstate: show pattern error in hgignore file as expected Before this revision, invalid pattern in hgignore file causes unintentional failure for UnboundLocalError of ignorefunc, if hggit is used with Mercurial 3.5 or later. In such case: - checking source of invalid pattern at failure uses "pats" list for hgignore files, but - "pats" list is empty, if ignoremod is None (= Mercurial 3.5 or later) - therefore, checking with matchmod.match() overlooks invalid pattern Then, "return ignorefunc" is executed without assignment to ignorefunc, and causes UnboundLocalError. To show pattern error in hgignore file as expected even with Mercurial 3.5 or later, this revision puts '(FILE, ["include: FILE"])' tuples into "pats" (to avoid code duplication, putting into allpats is shared, too). This makes checking source of invalid pattern at failure work as expected for hgignore files. Fixes #197

GENERAL
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* work fine with eclipse plugin or tortoise-hg

MAPPING ISSUES
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* work in Git on a named branch created in Hg is forward-ported to be named branch commits in Hg and stripped back out if re-exported


REMOTE/BRANCH STUFF
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* explain what branch mapping policy determined when updating refs
* error nicer if pushing to remote without push access (over git://)

WEBSITE
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* more usage documentation
* screencast


SPEED/EFFICIENCY
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* dulwich improvements
  - don't send blobs/trees already on server
  - thin packs
  - packfile creation benchmarking (seems to take a while sometimes)
  - at least provide status output

MAYBE
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* submodules?
* .gitignore, etc - try to convert? 
  - (probably not automatically, but perhaps a generator?)