made messagelog handle messages with newlines

Added a crash catcher which trigger under Linux. It calls GDB and tries to get a backtrace. Also integrated assertion failure handling to this new system. Removed the print() function in the process (because the new bomb box uses a text edit and QTextDocuments's print method clashes with the macro and I figured it was a good idea to rid it anyway) and replaced all calls with log().

fixed: LDForge would crash if message log got full - the older lines would be removed with ::erase, which now expects an iterator because of the recent transition to QList. Why does QList::iterator allow 0 to be passed?

fixed a small memory leak

Fixed: LDForge would sometimes crash over unitialized data in the GL renderer. This crash sure eluded me for a while. Turned out zoomToFit(), which uses m_width and m_height is called before resizeGL() which initializes these variables. This data is used in an operator new[] call.

- added debug/release build configuration. Debug builds are really useful things!

removed some custom functions in favor of Qt implementations

reworked the ring finder algorithm greatly, tries harder to find the optimal solution

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