Use [u]int32_t instead of [unsigned] long.
Use int16_t instead of short.
Use uint8_t instead of unsigned char.
Merge branch 'stdint' into develop
Enable x86_64.
Make Antares compile on x86_64.
Merge branch '64' into develop
Empty message queue at start of level.

Prevents seeing queued messages from previous level.
Merge branch 'messages' into develop