Started work for non-background linter (i.e. run a linter once). Tested with existing Python linter.
Started work for non-background linter (i.e. run a linter once). Tested with existing Python linter.

benesch/sublime-linter,biodamasceno/SublimeLinter-for-ST2,tangledhelix/SublimeLinter-for-ST2,tangledhelix/SublimeLinter-for-ST2,biodamasceno/SublimeLinter-for-ST2,uschmidt83/SublimeLinter-for-ST2,uschmidt83/SublimeLinter-for-ST2,benesch/sublime-linter,SublimeLinter/SublimeLinter-for-ST2,SublimeLinter/SublimeLinter-for-ST2