Added underlyingView property to get background content from a view other than superview
Fix spinloop, updates of hidden views

Takes up much less CPU now (sleeps instead of spins when waiting for the next update)
Merge remote-tracking branch 'tleavy86/master'

Conflicts:
	FXBlurView/FXBlurView.m
Always prepare superview before snapshot; Remove superfluous parameters
Merge pull request #31 from Clinkle/master

Add underlying view (With bugfix)
Updated to version 1.5
Merge branch 'master' of https://github.com/nicklockwood/FXBlurView

Conflicts:
	FXBlurView.podspec
	FXBlurView/FXBlurView.h
	FXBlurView/FXBlurView.m
	LICENCE.md
	RELEASE NOTES.md
Updated to version 1.5
Removed duplicated code by extracting things into separate methods
Added missing statement to call completion block in one of the branches
Merge pull request #34 from JaviSoto/master

Fixef DRYness in -updateAsynchronously: method
Updated to version 1.5.1
Updated to version 1.5.2
Updated to version 1.5.3
Fixed reintroduced pixelation issue on iPad mini
Handles updates to background when animating the blurred view position.

Uses the presentationLayer of the view and the underlying view to find
the position allowing the blurred view to show an updated background
when it is being animated.
Merge pull request #43 from richy486/master

Handles updates to background when animating the blurred view position.
Updated to version 1.5.4
Update FXBlurView.m

Don't use presentationLayer if you don't have one
Merge pull request #45 from jhollida24/master

Update FXBlurView.m