Log Message:
blastem: Add emulators/blastem version 0.6.2

BlastEm is an open source, higly accurate emulator for the
Genesis/Megadrive that runs on modest hardware.

Features:

* Save states
* Integrated debugger
* GDB remote debugging
* Joystick/gamepad support
* Mega/Sega Mouse emulation
* XBAND and Saturn keyboard emulation
* Support for homebrew using the SSF2 mapper with Mega Everdrive
  compatible heuristics
* Save RAM and EEPROM support
* Cartridge lock-on for both Sonic & Knuckles and XBAND
* Turbo and slow modes
* configurable low pass filter
* Single pass GLSL shaders
* Sega Master System emulation