Fix gradient rendering code so re-rendering works without crashing
Added NUITests target to the NUIDemo project
Add support for background-repeat
Merge pull request #227 from phatmann/fix-gradient-rerender

Fix gradient rendering code so re-rendering works without crashing
Merge pull request #235 from squarefrog/master

Added NUITests target to the NUIDemo project
Fixing #178
Adding explanation and iOS7 check for #178
Merge pull request #244 from davidlawson/master

Fixing #178
Added tests for UIButtonRenderer

The tests are split into 4 test classes.

`NUIButtonRendererTests` - the test class for the majority of
properties.
`NUIButtonRendererBackgroundColorTests` - a class which tests the
setting of background colors.
`NUIButtonRendererBackgroundImageTests` - a class which tests the
setting of background images.
`NUIButtonRendererForegroundImageTests` - a class which tests the
setting of foreground images.
`NUIButtonGradientSnapshotTest` - a subclass of `FBSnapshotTestCase`
which checks that gradients are applied correctly.
Added Travis config
Added UIBarButton tests
Add bar-tint-color property to NavigationBar
Merge pull request #256 from phatmann/bar-tint-color

Add bar-tint-color property to NavigationBar
Merge pull request #255 from squarefrog/tests

Implemented the first set of tests.
Merge pull request #257 from squarefrog/bar-button-tests

Added UIBarButton tests
NUIGraphics: removed hard-coded size from methods to create 'rounded rect layers'; a parameter is used instead.
NUISegmentedControlRenderer: added support for custom sizes in segmented controls.

- was previously defaulting to a height of 50px if any other properties were set.
Merge pull request #262 from agustindc-rga/segmented-control-update

Segmented Control Updates
Only adjusting the corner radius of UIButton nested view's / layers (except UILabel) if a shadow-* property is set.
This avoids and issue with clipping button text when using corner-radius (see #266)
Merge branch 'clipped_uibutton_text_fix' of github.com:glentregoning/nui into clipped_uibutton_text_fix