push/pull: abort if we try to visit a missing or empty revlog

i18n: fix complaints from pygettext

verify: improve handling of empty or missing files - explicitly notice empty or missing changeset, manifest or file revlogs - shortcircuit warnings relating to missing changeset or manifest revlogs - fix changeset/manifest crosscheck swapped variables - properly sort crosscheck messages

Merge with crew-stable

convert: read CVS files in chunks (issue 800) socket.makefile() fails on large read requests (more than 10MB) with MemoryError.

test-convert-svn-sink: test directory additions

convert: add directories to subversion from root to leaves

convert: force svn:executable when execute-bit is not supported The util.is_exec fallback would be to ask subversion for the current value of svn:executable. Setting it directly is just simpler.

convert: fix svn file:// URL generation under Windows

mq: avoid qnew committing everything on invalid paths (issue 803) If paths are supplied but resolve to nothing, localrepo.commit() is called with an empty set and commits the whole dirstate. Avoid this by passing the match function to commit.

highlight: clean up coding style a little

extension for synax highlighting in the hgweb file revision view Depends on the pygments syntax highlighting library: http://pygments.org/

Change standard streams mode to binary at hg startup Standard streams are expected to operate in binary mode everywhere, especially with archive, cat, diff and export commands. Rewriting these to separate informational output from binary content is complicated to do and to maintain, nonwithstanding mode switching reliability. Changing all output mode to binary should not have much impact on Windows were stream processing tools are barely used and usually cope with unix style endings. Streams mode being process wide, the switch is performed in the startup script to avoid polluting existing API users who may have solved this issue already or ignored it at least for the mercurial part.

test-import: read email payload in binary mode

convert: fix util.popen regression in darcs converter