Stata Syntax Highlighting for Notepad ++

This is a sligthly modified version of this: https://bitbucket.org/keithk/notepad-stats-integration/src/6e97c67298a56e55480392599db6bd9e72add667/userdefineLang_stata.xml?at=default&fileviewer=file-view-default

The main differences are

• Globals are highlighted if ${square} brackets are used
• Background color removed for square brackets (for loops etc.)
• Unified font shape
• some custom commands added