adding 'a Unix-like OS' as a requirement
throwing a bone to Windows users
adding a message of hope to Windows users, those poor souls...
adding a page describing the use of Synthesize, the install script
capitalizing UNIX, and unawkwardizing a phrase.
capitalizing the other UNIX
Adding missing period to document.
Merge pull request #838 from gwaldo/0.9.x

0.9.x - Merging in docs on Synthesize and Windows Hope
Number of results from cache query was incorrectly logged
Merge pull request #840 from Kixeye/0.9.x-carbon-cachequerylogmsg

Number of results from cache query was incorrectly logged (0.9.x)
Improved documentation for cactiStyle

Explained possible options for system (not letting the reader hunt around for
possible values), as well as culled most info for alignment from:
https://github.com/graphite-project/graphite-web/issues/671
Improved documentation for areaBetween