Add in branches of pthread sizes for non-x86 platforms.
$(MODEL_FLAG) not needed for doc and di generation
Add some definitions for ARM
Merge pull request #520 from andralex/less-model

[MINOR] $(MODEL_FLAG) not needed for doc and di generation
Merge pull request #521 from jpf91/fixARM

Add some definitions for ARM
Merge pull request #519 from ibuclaw/dlp64pthread

Add in code paths for pthread sizes on non-x86 platforms.
changed demangle to support unicode symbol names
Merge pull request #524 from complexmath/fixdemangle

changed demangle to support unicode symbol names
Mark `TypeInfo` as `in` in aaA.
unittest for Thread.priority
Mark aaA function arguments with `in` and `inout`.
Mark aaA functions with `pure`, `nothrow`, and friends.
Apply aaA function signature changes to `object` module.
Override `equals` in `TypeInfo_AssociativeArray`.

Fixes part of Issue 10380.

Issue URL: http://d.puremagic.com/issues/show_bug.cgi?id=10380
use pthread_setschedprio where available

- on linux since glibc 2.3.4. (Jan 2005)
- on OSX and FreeBSD it's missing
add Thread.PRIORITY_DEFAULT and use Windows constants
add in contract to Thread.priority setter
Merge pull request #526 from dawgfoto/threadPriority

improve Thread priority
Fix "Unable to get/set thread priority" bug
Merge pull request #517 from mxfm/unabletoset

Attempt to fix "Unable to set thread priority" bug