January -> February.
Register should also (of course) be marked inUse when marked dirty.
Continuing on native code generation: beginning on register allocation.
Man page January -> February.
sys/mman.h is not needed here.
Updating the TODO.
The -e option is the only way to select a machine now (-E is removed).
Beginning to plan the IR and native code generation in GXemul 0.5.x.
Tagging GXemul 0.4.7.1.
Release 0.4.7.1.
