Fixed operator++. Added CreateXXX for vector types.

Added --escape-proto-identifiers command-line option.

Fix for issue #3922

Also, clean up redundant ';' at end of java classes.

same fix for general code generator

Fix for make

Fixed typo

Fix mac build error

is => it

Also added simple (in-process) test.

Change-Id: I38580d554dd52f590e3396ec4846e07546dcf07d
Tested: on Linux.

Added new constants