libpdfrip

Add new implementation for Text rendering(Basic for now, giving results for files like /testfiles/renderer/simpleText.pdf

add COPYWRITE lines to top of all code files

add v and y operators in parser, applicable for /testfiles/renderer/05_Curves.pdf who's output will be /testfiles/renderer-output/05_CurvesResult383.png

fixes for the rendering of shapes

edit the code for better readablity in /cairo directory