* make AVX_FOUND is default value to WITH AVX
* let AVX_FLAG always keep -mavx flag since compiler can build binary with -mavx even CPU does not support avx.

* add rdma cmake support

* move rdma related code to rdma.cmake

* Add matrix inverse

* DYLD_LIBRARY_PATH is disable after Mac OS X 10.11
* fix clang + gpu compile error on Mac OS
* fix some words and errors in build docs

* Python trainer API and demo

* Adding missing PaddleAPIPrivate.h

* Adding api_train.sh

* More comments

* Bump up patch version to 0b3

* Fix bug in yield dictionary in DataProvider.
* Also make virtualenv work in Paddle.

In some situation, for instance, in the virtual machine, it could happen.

* Add automatic check AVX in CMake
* Revise table format and some words in build docs

* follow comments to fix bugs

* Also fix a bug, we should link -ldl at last

* Also make use cmake find to zlib.
* circle link in osx, use reverse link all libs instead. But
  maybe osx just don't care circle link.

* findLastSet function: size_t could be  uint, ulong, ulonglong
* add default cuda 7.0 in flags.cmake

Change-Id: Ica9d09520e6a1468e5fc97e2c29c1ea7c73dafbb

Change-Id: Ie237127bb0f537998827ab29ffde2526c21c6dd1

Change-Id: I569a4db567f27c1b9e143086930a9f7079c20f78

Change-Id: I79fd722623430c11363c819bbd3ef10099197dbb

ISSUE=4622423

git-svn-id: https://svn.baidu.com/idl/trunk/paddle@1503 1ad973e4-5ce8-4261-8a94-b56d1f490c56

ISSUE=4586495

git-svn-id: https://svn.baidu.com/idl/trunk/paddle@1408 1ad973e4-5ce8-4261-8a94-b56d1f490c56