Add Coveralls for test coverage.

Fix bug with how the clicked-on splitter is determined, which caused us to pick the wrong splitter in tmux integration mode, which caused issue 4163.

Use unique IDs to identify PTYWindow in scripting rather than indexes. The notion of windows being ordered is misbegotten. It causes issues like #4157.

Fix a bug where move start of selection forward by mark will jump over a mark when lines are adjacent. Issue 4154.

Refactor code that decides if the hotkey window should be hidden when a window resigns key. Add a feature to try to detect when spotlight is opened to not auto-close the hotkey window when that happens. The new feature is behind a default-off flag because I'm sure it'll do something unexpected. It should be turned on by default in the 3.1 beta.

Toggle the dock/menu visibility when switching desktops to a hotkey window to work around issue 4136.

Mock defaults for PTYTextViewTests. Adds Cocoapods, Adds OCMockito and OCHamcrest. Adds iTermSelectorSwizzler so tests can replace NSUserDefaults with a mock. Fixes disabled tests by setting user defaults for them. Re-enables those tetsts.

When switching between primary and alternate buffers, invoke -redraw after a very short delay rather than immediately so there's no flash when an app wants to switch buffers, write a little, and immediatley switch back.

Fix a bug where full-screen flash would sometimes not draw a full frame without any flash. What would happen is that further updates were canceled from within drawRect:, but if the rect being drawn were small and ill-timed, most of the screen would never get redrawn. Now, a call to setNeedsDisplay:YES always gets made after the alpha reaches 0.

Fix a bug when a dynamic profile inherits from a profile with the deprecated preference KEY_DEFAULT_BOOKMARK set to yes, which would cause it to possibly become the default profile. Issue 4115.

Re-enable disabled tests (iTermShellHistoryController)

Work around a crashing bug where a divorced profile has a GUID not in sessionsInstance. See issue 4141 for future changes related to this issue.

Add support for Travis CI

If a trigger causes automatic profile switching to change the profile then _triggers would get deallocated. Keep triggers around for the duration of the for loop in checkTriggers and break out of it if APS fires.