OpenCV info library name fixed;
Minimum API level for OpenCV library project increased up to 3 for using message dialogs.

Based on pull request #31 (thanks to Eric Christiansen)
Support for Java is turned off by default and can be enabled setting
BUILD_opencv_java to ON (e.g. cmake -DBUILD_opencv_java=ON ..)

Previously the generator always uses hardcoded list of modules.
This fix replaces hardcoded list with actual set of modules coming from cmake.

fixing bug #1987(android keeps RGBA in alpha pre-multiplied form, Mat <-> Bitmap should handle this correctly)