Add a reset function

- If Gifu is used within a UITableViewCell, there's no way to reset the animator directly. Otherwise, the UITableViewCell reuse of images get overlapped.
- Closes kaishin#33

Make test scheme to only build when testing

Bump to 1.0.0

Fix array index out of range bug

Closes kaishin#25

Bump version to 0.10.0

Update Runes dependency

Bump version to 0.9.1

Update to Swift 1.2 compatibility

Make demo run on Xcode 6.3

Use Runes for functional operators