upgraded int array ops
more fixes and formatting etc.
consistent use of size_t
improve unittests
DOCFMT is overwritten by d-programming-language.org's makefile
Add external implemented callWithStackShell for Linux/PPC64.

This is required for the garbage collector.
Merge pull request #485 from redstar/ppcthread

Add external implemented callWithStackShell for Linux/PPC64.
Merge pull request #484 from dawgfoto/fix10036

DOCFMT is overwritten by d-programming-language.org's makefile
Issue 10081 - Incorrect char array comparison

`char[]` type info is incorrectly inherited from `byte[]` type info instead of `ubyte[]` one so char arrays are compared like arrays of signed bytes.

Issue URL: http://d.puremagic.com/issues/show_bug.cgi?id=10081
Merge pull request #486 from denis-sh/fix-Issue-10081

Issue 10081 - Incorrect char array comparison
fix Issue 10057 - Module info overwritten in shared phobos

- detect module collisions by checking that all ModuleInfo* of
  a DSO point into the same segment

- abort the program in that case

- added core.sys.linux.errno to find the name of the executable
Remove unittests from object.di
Merge pull request #488 from ibuclaw/rmunittest

Remove unittests from object.di
Use correct version identifier for linux

The epoll interface uses the incorrect version identifier for Linux - ie. "Linux" instead of "linux" making it quite difficult to actually use the API :-)
Merge pull request #489 from goughy/master

Correct use of Linux version identifier in epoll interface
Merge pull request #487 from dawgfoto/fix10057

fix Issue 10057 - Module info overwritten in shared phobos
fix Issue 10106 - [ICE] Ice in glue.c:1215 + 2 error messages without lines

Workaround for const postblit issue with AA.
Merge pull request #490 from 9rnsr/fix10106

Issue 10106 - [ICE] Ice in glue.c:1215 + 2 error messages without lines
Add a HACKING file.
gc: Rename gcalloc.d to os.d

In the future this file will hold more OS-specific functions needed by
the GC, and this file looks like a good place to put them, so all
OS-specific functions are grouped in a single module.

Also, having the prefix gc on every file, when all this is inside a gc
package, doesn't seem to make a lot of sense, thus it will be removed
progressively.