Debugger: in MSIE sends error 503 instead of 500 to ensure error page is displayed
Debugger: refactoring of $errorTypes
Debugger: refactoring, added Helpers::fixStack
Debugger: added getters getBar(), getBluescreen(), getLogger() and getFireLogger(); static variables are deprecated
Debugger: removed static constructor
Diagnostics: removed shortcut debug()
Update readme.md (WIP)