add gc.config to configure profiling and pool limits through the command line
docs won't build because of missing variables in CoreDDoc mode
update deprecation of MAP_ANON from core.sys.posix.sys.mman

- remove MAP_ANON for linux from core.sys.posix.sys.mman
  (has been deprecated since sep 2013)

- add platform specific headers for mman (OSX, FreeBSD, Solaris, Android)

- add deprecation for other OSes
Revert "update deprecation of MAP_ANON from core.sys.posix.sys.mman"

This reverts commit 51c34ee56db983b3e08dee911f07010f3d4cc4bc.
Move prefix member function attributes to postfix
remove try-catch from AA hashOf
implement aaLiteral
update deprecation of MAP_ANON from core.sys.posix.sys.mman

- remove MAP_ANON for linux from core.sys.posix.sys.mman
  (has been deprecated since sep 2013)

- add platform specific headers for mman (OSX, FreeBSD, Solaris, Android)

- add deprecation for other OSes
Revert "update deprecation of MAP_ANON from core.sys.posix.sys.mman"

This reverts commit 76962185d2b07865a9811cfe0107596db7460492.
Merge pull request #984 from IgorStepanov/hashOf-aa-safe

remove try-catch from AA hashOf
Merge pull request #933 from IgorStepanov/newaa-aaLiteral-and-aaInit

[new AA] implement aaLiteral
return Thread object in start method

- allows to write more concise code to start a Thread
Merge branch 'fixThreadDocs' into threadStartMethodChaining
Merge pull request #983 from 9rnsr/fix12931

Move prefix member function attributes to postfix
Merge pull request #972 from MartinNowak/fixThreadDocs

[trivial] docs won't build because of missing variables in CoreDDoc mode
Merge pull request #973 from MartinNowak/threadStartMethodChaining

return Thread object in start method
Merge pull request #817 from rainers/gc_config

make GC configurable through environment variable
Add CLOCK_REALTIME_FAST for FreeBSD.

Added the platform-specific CLOCK_ values for Linux and FreeBSD and put
them in their own files, deprecating the pre-existing ones in the posix
file.

This is required for Phobos pull# 2584.
Merge pull request #981 from jmdavis/CLOCK_REALTIME_FAST

Add CLOCK_REALTIME_FAST for FreeBSD.