add test image file
get image as base64 encoded string in models
change api to get image as base64 string
remove paperclip generated files
configure testhelper to cleanup paperclip directories
add image params to doc
add content type to image
Merge branch 'master' into base64

Conflicts:
	app/models/issue.rb
Merge pull request #3 from code-for-india/base64

Base64