Adding logic for mouse following focus.

When focus changes, SIWindow queries the Configuration to see if the user would
like for their mouse cursor to follow the focus change.  If so, it will position
the cursor in the midpoint of the window.  The default setting is for this not
to happen.

Also, tidied up the logic for ignoreMenuBar to be consistent with the rest of
the codebase.
Cleaning up mouse follows focus logic.

Instead of extending the SIWindow class with a method of the same name,
I added a new method `AMFocusWindow` which AMWindowManager now calls.
This method calls the original `focusWindow` method of SIWindow
and then performs mouse follows focus if it is configured.  Also added
a brief README entry for the setting.
Code Cleanup

* Rename AMFocusWindow to am_focusWindow to follow conventions.
* Proper conditional when checking the return value of focusWindow in
	am_focusWindow
* Inline midpoint
Merge pull request #113 from leonardt/mouse-follows-focus

Adding logic for mouse following focus.
Make default.amethyst valid JSON, remove invald key
Merge pull request #118 from Dhertz/master

Make default.amethyst valid JSON, remove invald key
Bump cocoapods version in podfile lock
Bump version for release 0.8.4
Bump version link in README to 0.8.4
Added instruction for floating config
Update README.md
Merge pull request #126 from deiga/patch-1

Added instruction for floating config
Add a row layout, useful for vertical displays
Merge pull request #131 from benlodotcom/master

Add a row layout, useful for vertical displays
Update Syntax Highlight in README to be consistent
Merge pull request #140 from leonardt/patch-1

Update Syntax Highlight in README to be consistent
Fix space identification in Mavericks per-screen spaces

In Mavericks, each screen (by default) has its own set of spaces. This
means each screen manager must keep track of its own space identifier.

Extend ianyh's NSUserDefaults hack [0] to identify which screen each
visible window belongs to, in addition to which space it belongs to.
Correlate the two to determine which space belongs to which screen.

Fixes #139.

[0]: http://ianyh.com/blog/2013/09/24/identifying-spaces-in-mac-os-x/
Merge pull request #145 from benesch/master

Fix space identification in Mavericks per-screen spaces
Fixed "Xcode" mistype
Merge pull request #146 from pedrovieira7/master

Fixed "Xcode" mistype