Reformatting MDLV2000Reader in preparation for patching.

Signed-off-by: Egon Willighagen <egonw@users.sourceforge.net>
Resolves warnings in the MDLV2000Reader class including, redundant assignment, redundant casts, using for int loops when for each can be used and using StringBuilder instead of StringBuffer. Unchecked casts have also been suppressed.

Signed-off-by: Egon Willighagen <egonw@users.sourceforge.net>