add okular viewer, added "forward_sync" setting

Okular viewer setup and seems to be working (at least with my okular 0.14.3 on kde 4.8.5)

I added a "forward_sync" setting - "forward_sync_on_success" in the HEAD version causes VIEW on build success, but the 'jump' command is passed `{"forward_sync":False, ..}`.  This isn't the best solution, but I didn't want to change an existing parameter name...


	modified:   LaTeXSq.sublime-settings
	modified:   jump.py
	modified:   make.py