Bump gem version to 0.2.1

Bump gem version to 0.2.0

Bump gem version to 0.1.4

Bump gem version to 0.1.3

Remove nil parameters on CarrierWave inclusion

Merge pull request xing#2 from xing/opsidao/new_jpeg_defaults

Allow to pass quality and resolution when including

Merge pull request xing#1 from xing/opsidao/add_travis

Setup the travis initial build