review r640

Usage:

python -m review [options]

Changes:

r640 - Add perforce support, by Alex McCarthy (2635043)
r632 - Support for Rietveld instances moved by HTTP 301 (3227041)
r590 - Look at the old filename only for add with Mercurial (2951041)

r588 - Support "http://" prefix when detecting localhost usage (2736045)
r585 - Fix wrong base revision for Python repository (issue #239, 2442042)

r579 - No depth restriction on 'hg diff' by default (issue #234, 2292041)
r566 - Remove "default" from help text for --verbose (2048041)
r561 - Locate subversion config on Windows (1983049)

r554 - Fix --rev option (git backend) when argument has a colon (issue #211)
r552 - Fix exception while trying to output an error (3109015)
r546 - Add application/x-sh to whitelist of uploadable files, by Derek Schuff
r541 - Fix variable usage when getting/setting keyring password (1900041)
r538 - Fetch base file from SVN url if local history is missing (issue #208)
r537 - Optionally use the 'keyring' module to avoid password prompts
r535 - Improve captcha message for Google Apps accounts (1690047)
r534 - Convert Unicode values to ASCII (1590044)
r531 - Add account type flag to upload.py (issue #195)

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