commit: move lots of commitctx outside of the repo lock

commit: combine _commitctx and commitctx, drop unused force argument

editor: move HG: filtering from ui to commiteditor

grep: make cache LRU rather than unlimited grep could cache an unbounded number of revlogs, limit to 20 with an LRU cache.

commit: move commit editor to cmdutil, pass as function

context: add p1 and p2 methods

commit: push repo lock down into _commitctx

commit: move 'nothing changed' test into commit()

commit: drop unused p1 and p2 args

tag: drop unused use_dirstate and parent from _tag()

filecommit: swallow some bits from _commitctx, add _

commitctx: replace wctx with ctx

commitctx: replace two dirstate vars with working

commitctx: simplify locking (spotted by Simon Heimberg)

remove deprecated rawcommit

patch: copy copies dict before changing it (issue1651)

status: check cmp list in order

verify: detect manifest revs not in any changeset

localrepo: use more direct vars in addchangegroup

localrepo: use cl throughout in addchangegroup

revlog: slightly tune group() by not going rev->node->rev

drop unused imports

indentation cleanup

test-debugcomplete: add --show merge option to output