Updated iOS camera. Added rotation flag. Added functions to lock/unlock focus, white balance and exposure.
Added regression tests for SURF/SIFT (related to #2892)
fixed Kirill's comments
updated licenses
Merge pull request #1007 from alekcac:i_camera
Java/Python bindings for computeCorrespondEpilines added.

Simle Java test for computeCorrespondEpilines added.
Merge pull request #994 from asmorkalov:android_java_wrappers
Merge pull request #1008 from ivan-korolev:fix_sift_bug_2892
Extended the CPU/GPU selection mechanism in performance tests.

Now it allows choosing between arbitrary implementation variants.