Mostly const fixes in headers to make it easier for users to have more warnings enabled in static code analysis
Also updating our own rules a bit (kicking some out we won't need yet).
git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@6583 dfc29bdd-3216-0410-991c-e03cc46cb475
Lots of places where coders did not realize our Printer::log with hint adds a ": " string between message and hint
Which caused uglier messages in a few places (added documentation for that, maybe helps?)
Some added info in a few places
Some whitespace unification
Some spelling unification
git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@6414 dfc29bdd-3216-0410-991c-e03cc46cb475