Various Java razor improvements

[mpkorstanje]

I made a couple of improvements to the razor file for Java. This make the file usable out of the box.

• Constructor name should be equal to the class name
• Moved the comments to avoid whitespace at start of file
• Made fields, classes and methods package private to avoid exposing parser in public API
• Replaced dedicated ITokenScanner interface with Iterator<Token> and Iterable<Token>
• Renamed TokenMatcher to SimpleTokenMatcher
• Renamed ITokenMatcher to TokenMatcher to fit with Java standards
• Added Func class.
• Redid parse method arguments. The Reader interface isn't the right tool here. It only allows individual bytes to be read rather then codepoints.