added missing info (on return value) to ofxCvContourFinder::findConto…

…urs()

_documentation/addons/ofxOpenCv/ofxCvContourFinder.markdown

@@ -316,7 +316,7 @@ Draws the detected contours into the ofRectangle passed in scaling if necessary.
 _syntax: findContours(&input, minArea, maxArea, nConsidered, bFindHoles, bUseApproximation = true)_
 _name: findContours_
 _returns: int_
-_returns_description: _
+_returns_description: number of blobs found
 _parameters: ofxCvGrayscaleImage &input, int minArea, int maxArea, int nConsidered, bool bFindHoles, bool bUseApproximation=true_
 _access: public_
 _version_started: 007_
@@ -340,6 +340,8 @@ _inlined_description: _
 _description: _
 
 
+This function tries to find distinct regions (blobs) in the given ofxCvGrayscaleImage. It returns the number of blobs found.
+
 input
 
 This is an ofxCvGrayscaleImage reference (ofxCvGrayscaleImage&) to a grayscale image that will be searched for blobs. Note that grayscale images only are considered. So if you're using a color image, you'll need to highlight the particular color that you're looking for beforehand. You can do this by looping through the pixels and changing the color values of any pixel with the desired color to white or black, for instance.