Convert code indents to tabs to be consistent with the rest of the
JavaScript code. This commits covers all of the lua code, some of the
hand written JSON code and the lone HTML and CSS files that were not
using tabs.
Fix crash when technologiy level stored on the master is greater than
the max_level for the technology in Factorio. This can happen with mods
that for example reduce the max_level from inifity to a finite level.
Hornwitser