Cosmetic css improvements.
2.1.1 Improved options page css to expand url part of named tab rows to use full remaining screen space.
Cosmetic code improvements with underscore.
Added group messaging ability with one command implemented 't G' to share current url with current singleton group.
v2.1.2 Added group messaging ability with one command implemented 't G' to share current url with current singleton group.
Added group command files
Merge branch 'store'
v2.1.3 BrowserAction shares current tab with current group.
v2.1.3 Fixed group port usage.
Added open window with urls method.