Fix warnings.

- gcc appears to be overly strict about narrowing.
- remove an unused variable.
Print the data in undefined opcodes in Debug mode.

(Why did I never do this before!?)
Implement child object copying.

Text now scrolls properly in the battle message box in LB.
RealLive appears to have the equivalent of objAdjust for alpha, too.
Add dummy versions for the objOfChild commands.

(I am tired of them showing up in the logs, and maybe shrinking their child
size from default is good too.)
Pass the current active window back to bytecode.
Get status menu portraits animating in Little Busters.

Sometime around when LB was released, RealLive added the ability to change an
object's properties over time. This puts down the architecture to do this in
general and creates implementations for objAlpha and objAdjust.
More object mutators
Small fixes to the README.TXT
Add the opcodes that immediately end object mutation.
Add the blocking wait opcodes for object mutators.