Fix http generated images path when using Compass sprites 

Otherwise compass uses '/source/images' for the sprite image URL
Deprecate 1.9.2, add 2.0.0 :)
Merge pull request #1298 from imathis/deprecate-192-whoops

Deprecate 1.9.2, add 2.0.0
Merge pull request #1297 from ndbroadbent/patch-1

Fix http generated images path when using Compass sprites
Merge branch 'master' of https://github.com/imathis/octopress
add submodule and modify gitignore