DOC/STY : whitespace changes + inline comments
DOC/STY : whitespace changes + inline comments

 - minor white space changes to docstring and code
 - add verbose in-line comments about canvas deadlocking

licode/xray-vision,sameera2004/xray-vision,sameera2004/xray-vision,licode/xray-vision,giltis/xray-vision,giltis/xray-vision,ericdill/xray-vision,ericdill/xray-vision