SkewbSkills v2.0: Show / Hide scramble image; use WCA scrambles; design updates & bugfixes

• Show or hide the scramble image
• additionally prints WCA notation in the L2L Trainer, without double moves ("cancels moves") to simplify scrambling
• minor design updates, bugfixes

SkewbSkills: new folder structure, changed menubar

Icons and Scrambles located in their own folders
Menubar with shortcut to close window
minor changes of the tooltips

SkewbSkills: FLT and L2LT with stopwatch, less unnecessary stuff

Uses a more accurate stopwatch, features a stopwatch for the First Layer Trainer.
Added more buttons in the menubar, more shortcuts for settings.
Faster way in which the scrambles for the FLT have been generated, using less disk space and fewer lines of code. Loading new scrambles in the FLT will not take as long as in the previous version.
Help window containing a guide to use SkewbSkills.

SkewbSkills: First Layer and Alg Trainer

Use the First Layer Trainer or the Alg Trainer.