Fix typo in custom_stylesheet.md

Changed 'One of the way is by...' to 'One way is by...'
Another option is 'One of the ways...', but I opted for less words
Merge pull request #76 from clouder/patch-1

Fix typo in custom_stylesheet.md
Module Addition Note
fixed the missing tags in the unsupported page
Update creating_new_feature.md

Just deleting an extra character "s" so it will follow current directory structure
Update INDEX.md

I would remove any mention of Joomla! 1.5 support. Furthermore, it doesn't appear the Framework is available for download in 1.5. At least I couldn't find it here: https://code.google.com/p/gantry-framework/downloads/list?can=1&q=platform%3Djoomla25&colspec=Filename%20Summary%20Uploaded%20Size%20DownloadCount%20Type%20Platform&num=100&start=100
Merge pull request #81 from simmonsr/patch-3

Update INDEX.md
Merge pull request #80 from eduardodiazrivera/patch-1

Update creating_new_feature.md
Merge pull request #79 from newkind/wordpress

fixed the missing tags in the unsupported page
Update creating_popup_login.md

Updated RokBox to the new Syntax as suggested on #65
Updated Responsive Suffix Chart
Update responsive_grid_system.md
Merge pull request #83 from richvohs/patch-1

Update responsive_grid_system.md
Update custom_stylesheet.md
Merge pull request #84 from gantry/staging

Merge staging to master