Graph 89 - Donate version for Android

This is the Donate version of Graph 89, an emulator for TI89 series graphing calculators.If you use the free version often enough, please consider buying the donate version. This will help me provide new features and support.The donation goes towards the effort needed to port an already free and open source emulation engine provided by http://lpg.ticalc.org/prj_tiemu into the Android operating system as well as developing the front end of the emulator.Recent changes:v0.0.7 Keyboard support, Button highlight, Configure Haptic Feedback duration, CPU overclocking/underclocking, Upload *.89f files, Some performance improvements.v0.0.6 Install AppsContent rating: Everyone