Add ruby_version highlighting group
Add RVM segment
Add RbEnv segment
Added Syntastic Flag Segment
Added Syntastic Segment.

Add a new segment to theme with name 'syntastic_segment' and it will
display the SyntasticStatuslineFlag from syntastic.

Refactored Syntastic Segment

Checking if function SyntasticStatuslineFlag exists in vim first before
getting it's value.

Refactored further
Add unite.vim matcher and theme
[update] add unite and tagbar theme config