Fixed Issue Marxon13#33

Fixed issue that caused the metro progress bar to not be vertically
centered when displaying as a line.

Fix for issue Marxon13#26

Fix for random crashing caused by the CADisplayLink during animations.

More Updated Documentation

Updated pod spec to latest version

Updated pod spec to latest version

Xcode project updates

Fixed Issues Marxon13#9, Marxon13#14, Marxon13#16

Also updated the documentation to reflect the changes.

Merge pull request Marxon13#5 from tbergeron/master

Fixed podspec