Colored line addition/subtraction counts

Use css to target the correct span tags that contain the counts for the commit lines.

Added/removed colours are taken from the table row background colors in the diff preview.
Merge pull request #393 from Jackbennett/color-commit-line-numbers

Colored line addition/subtraction counts
Tweak commit diff line number colors
Fix load more for new files in staging
Offline less compilation for components
Offline browserify for ungit plugins
Don't embed css
Newline after plugin refs
Merge remote-tracking branch 'codingtwinky/third'

Conflicts:
	test/spec.git-parser.js