[TxMt] solution for hard-to-see highlighting in Solarized Dark

[Alexander Shenkin]

Hello Everyone,

I've been participating in a thread on GitHub 
(https://github.com/deplorableword/textmate-solarized/issues/52) that 
has identified the selection of text in the Solarized Dark theme as a 
real issue.  It seems that implementation of 
selectionForeground/selectionBackground may be one solution for the 
frustrating issue.  I wanted to see if there was a wider desire for a 
solution to this problem here, and perhaps if there was more support for 
the implementation of selectionForeground/selectionBackground.

Thanks,
Alex