- various improvements to error/log displaying
 * fixes #100 : error line fetching / displaying , in MOST cases (wherever actually retrieving an error line is possible)
 * added different css styles for the levels of errors/logs
 * code editor markers for linting and errors are now handled seperatly and will not clear each other out anymore
 * various related improvements and fixes

- cleaned up event handling : all project event are now correctly unregistered when a new project is created or loaded
 * no more duplicate event dispatching after project creation or loading
 * added new "project:created" event to the various editors