modified SIFT to 1) double image before finding keypoints, 2) use floating-point internally instead of 16-bit integers, 3) set the keypoint response to the abs(interpolated_DoG_value). step 1) increases the number of detected keypoints significantly and together with 2) and 3) it improves some detection benchmarks. On the other hand, the stability of the small keypoints is lower, so the rotation and scale invariance tests now struggle a bit. In 2.5 need to make this feature optional and add some more intelligence to the algorithm.

added test that finds a planar object using SIFT.

Fixed visualization by choosing the color appropriate to the detection
score.
Previously the example showed all detections with the same color
disregarding the confidence. This led to the impression that the object
detection did not work at all because there are many detections with low
confidences.

PR to master was
https://github.com/Itseez/opencv/pull/320

- fixed printCudaDeviceInfo for new CC
- fixed some compilation errors and warnings
- removed unset command from CMake script
- removed unused std imports

Application menu reorganized;
Resolution control added.

ReadMe.txt for OpenCV Manager added;
share folder excluded from SDK.

Aditional toasts added;
Exception handling improved;
Bitmap recycling added.

removing Android tutorial 0 since it has become irrelevant after moving to the new application framework

Sample renamed to CameraControl;
Picture taking added to show camera preview restart.

In tutorial-1 fps meter enabled via layout.xml. Camera id is set to "any" via lauout.xml;
In tutorial-2 message moved ion the bottom of the screen.

(#2569) simplifying code to avoid Eclipse CDT editor confusion, removing warnings and typos in comments

All samples use application style in android manifest instead of system calls in onCreate event now.

- Adding Android SDK/ADT r21 compatibility;
- fixing stl headers path for new ndk;
- fixing native API level for Android projects

These codes should be included into regular builds.

Face detection package name replaced on org.opencv.facedetect for consistency with Google Play package.

Memory leak in color-blob-detection sample fixed;
Default face size in face-detection is set to 20%;
Error handling improved;
Some possible mat leak fixed;
Manager verison and engine interface version incremented to fix incompatibilities;
Docs updated;

Some unification done to simplify camera switching.