Merge pull request #2 from kamalpreetgrewal/master

improves names of variables and code cleanup
changes filename of .pro file
Merge pull request #3 from bhattigurjot/master

changes filename of .pro file
adds scene class and comments out entities code
Merge pull request #4 from bhattigurjot/master

adds scene class and comments out entities code
corrects names of classes
Merge pull request #5 from bhattigurjot/master

corrects names of classes
implements point entity and saves file as xml