Merge pull request #4 from peedeeX21/master

get a update
Merge pull request #5 from peedeeX21/master

update again
Merge pull request #6 from peedeeX21/master

update
added some functions to get the angle to a blob relative to the images middle
I didn't test those yet!
Update angles.cpp

arcsin is asin in c
Merge pull request #9 from x1212/master

some functions to get angles from coordinates