Small gramatical tweak to content
Merge branch 'raw_blog'
Merge branch 'raw_blog'
Merge branch 'raw_blog'

Conflicts:
	source/_posts/2012-09-12-linear-regression-using-ruby.markdown
Merge branch 'raw_blog'
Merge branch 'raw_blog'
Merge branch 'raw_blog'
Merge branch 'raw_blog'
Merge branch 'raw_blog'
Merge branch 'raw_blog'
Small grammatical change
Another small grammatical change
Add some more tags to post
Add note about downloading file
Merge branch 'raw_blog'
Merge branch 'raw_blog'
Merge branch 'raw_blog'
Fix some image link that got broken for some reason