Show repo's revlog format on verify. Warn if some files use a different format.

Replaced 0 with REVLOGV0 where this meaning is used.

Corrected error message for incompatible revision flags.

Make the deprecated forget an alias of debugforget. This way it doesn't show up in the non-debug help.

Fixed test output for not using the deprecated 'hg forget'.

Fix revlog-ng interaction with old-http. revlog.py wasn't trying to detect the version of a revlog file that doesn't exist on the filesystem (as is the case with old-http). Additionally, there was an off-by-one error in httprangereader.read (ranges in HTTP Range headers are inclusive), making it get more data than what was asked for. This made a struct.unpack complain that "unpack str size does not match format". Finally, with the two fixes above, test-static-http fails, since BaseHTTPServer doesn't understand ranges and returns too much data. Work around that by reading only the specified amount.

Fix timezone check. According to http://en.wikipedia.org/wiki/List_of_time_zones timezones go from UTC-12 to UTC+14.

mke test-nested-repo use "revert" instead of "forget"

mark forget command as deprecated. will be removed after 0.9 released.

write to stderr with a single write call. this works around issue88.