Implemented SLF4J as logger and started migration

* Made gradle build script dependencies easier to read
* Changed gradle build script from tabs to spaces
* Added some javadocs where appropriate
Changed the font size of the hex editor

* Font size changed to 14 from 12
Changed hex editor font sizes

* Now the hex editor's font size is changed by the size of the window
    using a certain formula based on window height and width
Right curly braces should be located at the beginning of lines of code 
move the closing curly brace to the next line
Merge remote-tracking branch 'allevaton/master'
Merge remote-tracking branch 'fallaha13/master'

Conflicts:
	src/main/java/com/cburch/draw/actions/ModelChangeAttributeAction.java