* Fixed issue #243. Added optimize integration tests.
* Minor style change.
* XObjImage getParamsDict updates Columns and Rows.
* Added doc file for the optimize/tests package.
* UpdateParams for CCITTFax Encoder accepts Width and Height also. Removed
GetParamsDict Columns and Rows parameters from model.Image and
model.XObjImage.
* Fix i386 issue for the jbig2 arithmetic encoder.
* Added 386 architecture to the .travis/cross_build.sh