Update gradients.json

Add "Instagram", "Flickr" and "Vine".
Merge pull request #81 from nicklleite/master

Update gradients.json
Update json file with new color.
Add Portrait
Update gradients.json
Added .gitignore
Merge branch 'master' of github.com:Ghosh/uiGradients
Merge branch 'patch-1' of github.com:grgcul/uiGradients
Merge branch 'master' of github.com:helenvholmes/uiGradients

Conflicts:
	gradients.json
Merge branch 'master' of github.com:Samirbekaert/uiGradients
Merge branch 'master' into site

Conflicts:
	.gitignore
Fixed missing comma
Merge branch 'master' into site