Updated libGDX and MobiVM's RoboVM to latest versions.

3.18 Add option for solid black letters instead of the "marbled" letters. (Click the gear icon before starting a session.) Updated to LibDX 1.6.5 Updated to RoboVM 1.6.0 Changed scoring algorithm. Scores generally will be now be lower, but this should end the un-realistic high scores some people get... 3.17 Desktop: Implement "always on top" input window for name of slot input. 3.16 Fix serious bug in card scheduling introduced in last update. 3.15 if learning box == 0 tries per card is 7 if learning box == 1 tries per card is 3 if learning box == 2 tries per card is 2 if learning box > 2 tries per card is 1 3.14 Reduce number of times a refresh challenge is shown based on knowledge rating of item to reduce time reviewing well known material. Update to libGDX 1.6.4, RoboVM 1.5.0. 3.13 Crash fix when loading a bad saved slot. 3.12 Update to libGdx 1.6.2 and RoboVM 1.3.0 "Deferred" dispose on screen change.

3.10 (By request) Add delay for "skip" on training screen to prevent accidental click through... Fix issue with cards being in a negative "box" causing negative scoring when getting them correct. When "no latin" mode is selected for "immersive" learning assistance, don't show latin on the training screen as well as not showing it on the challenge/response screen. 3.09 Make the reset for training check a little more aggressive. 3.08 (By request) Look for previous cards that are in box 0 and that show errors and mark them as new to trigger retraining.