Mat tutorial - grammar and spelling fixes
Fix CMake variables substitution in Android project files
Revert ffmpeg related changes from "thread-safe VideoWriter and VideoCapture"

This reverts commit 4abf0b31936c96887c028d799c6e89edfc4e197b.

Changes are reverted because they break build of proxy dlls on Windows
Adjust OpenCV version to 2.4.4
Merge pull request #457 from taka-no-me:fix_vars_expansion
Added a test that documents that negative numbers are not clipped by cv::saturate_cast
Added two tests to highlight bug #2788
Bug #2759 android.os.DeadObjectException on OpenCV Manager connection fixed.
DeleteLocalRef calls for jclass objects added.
configure desktop Java install, making JNI library name correct, and making it fat when possible
Temporary disabled parallel_writers_and_readers test
Reenabled second test
fix issue 2788
Merge pull request #416 from asmaloney:mat-docs-cleanup
Merge pull request #467 from asmorkalov:manager_jni_overflow
fixing eclipse import errors that can also be fixed via 'Fix Project Properties' menu
Merge pull request #471 from apavlenko:jar_install
Merge pull request #473 from prclibo:2.4
Merge pull request #470 from kirill-kornyakov:bug_2788_testing_add_method_for_column
Merge pull request #476 from apavlenko:eclipse_import_fix
fix performance issue of gpu reduction