Reverting tabs.cljs file back to original repo. I do not want to merge this file with the changes
specific to this branch.
Changed the URL which the Report Bug button takes the user to. Users will now
be taken to the Light Table issues page instead of a new page for creating
the issue. This is done to prevent duplicatoin of bugs.
Changed implementation of Reporting Issue. The GitHub site is now opened in a new browser tab;
this allows use of browser functions (eg. back and forward functions).
Merge remote-tracking branch 'upstream/master' into report-issue

Conflicts:
	src/lt/objs/intro.cljs
	src/lt/objs/menu.cljs
	src/lt/objs/tabs.cljs
Modified files for more simple implementation of Reporting Issues within Light Table.
Merge pull request #1297 from mortontw/report-issue

Add Report Bug Button within Light Table