Include more info about working with contours

Some readme examples for using functions on a Contours object
Examples detecting and playing with simple shapes and contours
Have travis test against node 0.8 as well
Merge pull request #36 from ryansouza/contour-stuff

Include more info about working with contours
Merge pull request #37 from ryansouza/node-08

Have travis test against node 0.8 as well
catch older versions in build step
Changing ImageStream -> ImageDataStream and creating ImageStream.

To pipe data into an image matrix, you now use ImageDataStream.

ImageStream is now a stream that transforms image buffers into matrices.
Add shortcut for face cascade file -> cv.FACE_CASCADE
unit test for imagestream
Fix path
provide image to event
Merge branch 'provide-cascades' into beta

Conflicts:
	lib/opencv.js
beta 0.0.11
Allow video capture to be streamed
add keywords to package.json
Add basic highgui window support
add matrix clone
v0.0.12
PyrDown / PyrUp
Blocking waitKey for development
Merge branch 'waitkey' into beta