context: add memctx for memory commits

merge with crew

coal: remove double template entry

localrepo: interpret ctx.filectx() exception as a missing file

localrepo: do not expose workingctx options These are implementation details and probably of no use to client code.

localrepo: extract _commitctx() from commit() _commitctx() takes a single changectx like argument. It gives way to commits from memory only.

context: let workingctx.date(), .user() and description() be overriden

localrepo: let commit() get extra data from workingctx

localrepo: hide commit() file selection behind workingctx

localrepo: replace dirstate by workingfilectx in filecommit()

context: let workingctx parents be overriden

graph: limit the number of displayed changest to a reasonable value

LookupError should have same __str__ as RevlogError

templates: graph lacked bottom search in default style

templates: fix navigation links for graph entries

make revlog.LookupError inherit from KeyError This will improve integration with external applications which depend on KeyError, which is usually raised by __getitem__ calls.

cvsps.py: remove unused Changeset member of logentry

tests: make new convert-cvs tests executable

graph: tweak the indentation algorithm

cvsps: fix a final whitespace nit

tests: fix test breakage from graph template changes

merge incorporation of graph into paper style

hgweb: Fix up non-coal styles to support graph.

make graph view work with paper style

add graph page to hgweb

convert: cvs.py - Allow user to use built-in CVS changeset code. tests: add two testcases for CVS conversion with builtin CVS including a testcase for issue 1148.

convert: cvsps - User interface to CVS changeset code in cvsps.py

cvsps: fix up some whitespace

convert: cvsps.py - code to generate changesets from a CVS repository

merge with crew-stable