tintColorDidChange is iOS7 only, preserve iOS6 compatibility
NSLinkAttributeName is iOS7 only, preserve iOS6 compatibility
Merge pull request #351 from gustavo-the-rabbit/iOS6_Compatibility

iOS6 compatibility
Bumping version to 1.9.3
Fixes implementation of tintColorDidChange. Uses activeLinkAttributes instead of linkAttributes. 

I believe this fixes #352.
Merge pull request #356 from jessedc/bug/tint-color-did-change

Fixes implementation of tintColorDidChange.
Revert "Fixes implementation of tintColorDidChange. Uses activeLinkAttributes instead of linkAttributes. "

This reverts commit 0a6516a4af6c5fb18bfa3a70c65e4a3dac5c7072.
[Issue #356] Using UIViewTintAdjustmentModeDimmed to check for tint color inactive state
Merge branch 'upstream'