Added MOG and MOG2.
Resolved a compiling error under Linux.
Resolved a compiling warning under Windows.
Resolved compiling errors under Linux.
Used perf_precomp.hpp instead of precomp.hpp for test.
Merge pull request #4 from Itseez/2.4

OpenCV changes
Fix bilateralFilter function
Optimized mog and mog2, which have much better performance.
add adaptive bilateral filter (cpp and ocl version)
fix warnings
Removed the trailing whitespace
Removed trailing whitespace
Removed whitespace.
Added perf namespace.
Removed performance test.
Python bindings for KeyPoint methods

Usage:

import numpy as np
import cv2
img = cv2.imread('messi5.jpg',0)
sift = cv2.SIFT()
kp = sift.detect(img)

pts = cv2.KeyPoint_convert(kp)

kps = cv2.KeyPoint_convert(pts.reshape(-1,1,2))

overlap = cv2.KeyPoint_overlap(kp[0],kp[1])
warning corrections
Prepare Downhill Simplex for pull request

This is an implementation of so-called downhill simplex method
(https://en.wikipedia.org/wiki/Nelder%E2%80%93Mead_method)

Please, let me know if you have any comments, whoever you'd be.
Removed trailing spaces

This caused warnings.
Removed trailing spaces

Continuation of work done in previous commit.