Modules redifinition in case of multiple includes of OpenCV.mk in single Android.mk fixed.
enable Tegra optimizations
matchTemplate perf tests added
blend use vector to optimize
write documentation for  BRISK
define the default remapping in the right scope
Make parallel video writer test pass if compiled without threading support
Merge pull request #404 from asmorkalov:android_opencvmk_fix
stricter eps for normed methods
Merge pull request #427 from vrabaud:brisk_fixes_2.4
remove a warning on Linux
fix a error in doc
Merge pull request #431 from snosov1:matchTemplate-tegra
Merge pull request #432 from bitwangyaoyao:2.4_blend
Merge pull request #438 from bitwangyaoyao:2.4_fixwarings
Merge pull request #434 from taka-no-me:fix_parallel_writer_test
added 8u type support to filterSpeckles function
Use gtest assertions in cascade test

This simplifies test debugging a lot
Merge pull request #441 from jet47:filter-speckles-8u
Merge pull request #443 from taka-no-me:fix_cascade_test
Fix some warnings from -O0 build