Created new controls.h file private to user32.dll and moved remaining
builtin controls definitions there.

- add offsets to ASPI struct defines
- spelling

not to the main dialog.

De-stub sin() and cos().
Add noimport flag to sin(), cos(), and pow().

Added support for having both ASCII and Unicode window procedures for
builtin classes.

Create A/W versions of GOPHER_ATTRIBUTE_TYPE and
GOPHER_ATTRIBUTE_ENUMERATOR.

format. Updated documentation.

optimized out.

Authors: Ove Kaaven <ovek@transgaming.com>, Andrew Lewycky <andrew@transgaming.com>, Gavriel State <gav@transgaming.com>
DIB section improvements; UpdateDIBSection has been replaced with
LockDIBSection and UnlockDIBSection, for improved thread safety.
DIB_Status_* is now driver-independent, and there's a new
DIB_Status_AuxMod. Better handling of DIB surfaces with nonstandard
pitch. Slight optimization of DIBsection->display BitBlt.

stack alignments.

UUID definitions (with the help of Francois Gouget).

instead of using symlinks.

Clear dlerror() before and after calls to dlopen/dlsym to work around
a glibc bug (thanks to James Abbatiello for tracking the bug).

rapidly reset the content and then replace the content.