Add note about 2.0.0RC2 to the homepage

Signed-off-by: Chris Larsen <clarsen@euphoriaaudio.com>
tcollector documentation completely reviewed, all colectors are covered with exception to: zfsiostats.py, zfskernstats.py.
tcollector documentation: text reformating, spaces before brackets, and 80 symbols breaks.
Merge pull request #22 from vasiliyk/gh-pages

tcollector documentation review
tcollector documentation for site v2.
Merge pull request #23 from vasiliyk/gh-pages

tcollector documentation for site v2.
Merge remote-tracking branch 'remotes/Official/gh-pages' into gh-pages
Move annotation API docs to a directory
Add /annotation/bulk API documentation for 2.1
Rebuild with Sphinx 1.3