Honour the exec bit when we go back in time. Fixes issue801.

fix typo in convert help text, update test

Fix file-changed-to-dir and dir-to-file commits (issue660). Allow adding to dirstate files that clash with previously existing but marked for removal. Protect from reintroducing clashes by revert. This change doesn't address related issues with update. Current workaround is to do "clean" update by manually removing conflicting files/dirs from working directory.

hgweb_mod: update unidiff() calls and finish e5eedd74e70f job

Fix context iterator.

Update convert help text Add Mercurial as a source format, clarify that the include directive triggers the exclusion of all not explicitely included files/dirs and use MAPFILE instead of revmapfile in the text, following the short message convention.