59 commits since v0.8.

Notable changes:
- Temporary immediate values are now cached in registers
- Registers are re-used as much as possible
- Supports specifying a custom cycles-per-opcode value
- Support running with the HLE BIOS in PCSX
- The threaded recompiler is finally stable and race-free
- Better priority system in the threaded compiler
- Drop support for unequal memory offsets to simplify code

Signed-off-by: Paul Cercueil <paul@crapouillou.net>