Scale assets at run-time based on device dimensions

At compile time, the assets are bitmaps scaled for a 1920x1200 device dimensions. They are then re-scaled at runtime, based on the size ratio.
Rename file for README display on github
Updating gitignore file.
Changing instructions with more details and correct spelling.
Fixng the java image resizer to automatically create directories in root assets folder if it doesn't already exists. Fixes crashes for new users who don't have these directories.
Removing trailing whitespace from instructions and Deploy.java.
Merging with master.