Log Message:
Changes 0.8.0:
* New features:
  * Loader improvements: automatically run at full speed while
    a loader is in progress and automatically start/stop the tape
    when the start/end of a loader is detected.
  * RZX 'rollback' support.
  * DivIDE support.
  * Interface I and microdrive emulation.
  * TS2068 support.
  * Kempston mouse emulation.
  * TZX generalized data block (0x19) support.
  * Much improved widget UI, including allowing selection of
    filenames.
  * Allow SDL full screen mode to be used.
  * Add the ability to save 'movies' as collections of screenshots.
  * Widget pokefinder.
  * Add a simple code profiler.
  * New libao sound driver.
  * New CoreAudio sound driver.
  * New PALTV 1-3x and TV3x graphics scalers.

* Emulation core improvements:
  * Improved screen rendering code (now character accurate rather
    than line accurate).
  * Corrections to write ordering and contention for EX (SP),HL,
    EX (SP),IX and EX (SP),IY.
  * Corrections to contention for OTIR and OTDR.
  * IR contention.
  * Flag bits 3 and 5 are copied on all BIT instructions.
  * Improved ULA emulation with respect to interrupt length.
  * Fix timings of shifted no operation opcodes.
  * An interrupt in IM 0 takes 13 tstates to acknowledge, not 12.
  * Improved speed control code.