tests: make test-mq-guards work with ksh

tests: tidy up reporting of skipped tests if not verbose: - print 's' rather than '.' - pass skipped test reports back to parent for -j - report which tests were skipped at the end - print '.' after test completion

Allow explicit disabling of extensions If the first character of an extension path is '!', the extension is silently skipped.

mq.el: define keymaps as convensions

mercurial.el: mark-marker() returns non-nil with no active mark on GNU Emacs

mq.el: declare variable mq-top

mercurial.el, mq.el: remove runtime dependencies on CL package * (require 'cl) at compile-time * don't use map()

hgk: colorize commits by authors Color commits by author. Colors will be assigned to authors by using a configurable list of colors. The line corresponding to current id (the version currently in the working tree) is highlighted in a special font which is also configurable. There is provision to assign fixed colors to authors. See .gitk comment for details.

osutil: use fdopendir instead of dirfd

convert: svn -- fix tags handling They were simply not detected.

convert: svn -- fix 'exists' Previously 'exists' erroneously returned False for empty dirictories. This is wrong since we want to detect even empty 'branches/' or 'tags/'.

merge with goto