add install path to /opt/compiler/gcc-4.8.2/bin:/home/liaogang/.jumbo/opt/sun-java6/bin:/home/liaogang/.jumbo/opt/sun-java6/jre/bin:/home/liaogang/.jumbo/opt/sun-java6/db/bin:/home/liaogang/.jumbo/bin/core_perl:/home/liaogang/.jumbo/bin:/usr/local/ganglia/sbin:/usr/local/ganglia/bin:/usr/local/apr/bin:/usr/local/cuda/bin:/opt/compiler/gcc-4.8.2/bin:/home/liaogang/.jumbo/opt/sun-java6/bin:/home/liaogang/.jumbo/opt/sun-java6/jre/bin:/home/liaogang/.jumbo/opt/sun-java6/db/bin:/home/liaogang/.jumbo/bin/core_perl:/home/liaogang/.jumbo/bin:/usr/local/ganglia/sbin:/usr/local/ganglia/bin:/usr/local/apr/bin:/usr/local/cuda/bin:/usr/lib64/qt-3.3/bin:/usr/local/bin:/bin:/usr/bin:/opt/ibutils/bin:/opt/bin:/home/opt/bin:/usr/local/sbin:/usr/sbin:/sbin:/opt/bin:/home/opt/bin:/home/liaogang/bin
ISSUE=4594417

git-svn-id: https://svn.baidu.com/idl/trunk/paddle@1424 1ad973e4-5ce8-4261-8a94-b56d1f490c56

ISSUE=4592807 

git-svn-id: https://svn.baidu.com/idl/trunk/paddle@1423 1ad973e4-5ce8-4261-8a94-b56d1f490c56

ISSUE=4539687

git-svn-id: https://svn.baidu.com/idl/trunk/paddle@1422 1ad973e4-5ce8-4261-8a94-b56d1f490c56

ISSUE=4586877

git-svn-id: https://svn.baidu.com/idl/trunk/paddle@1421 1ad973e4-5ce8-4261-8a94-b56d1f490c56

ISSUE=4591641

git-svn-id: https://svn.baidu.com/idl/trunk/paddle@1420 1ad973e4-5ce8-4261-8a94-b56d1f490c56

ISSUE=4582455



git-svn-id: https://svn.baidu.com/idl/trunk/paddle@1419 1ad973e4-5ce8-4261-8a94-b56d1f490c56

ISSUE=4590133


git-svn-id: https://svn.baidu.com/idl/trunk/paddle@1418 1ad973e4-5ce8-4261-8a94-b56d1f490c56

to fit hub.docker.com

ISSUE=4589547



git-svn-id: https://svn.baidu.com/idl/trunk/paddle@1417 1ad973e4-5ce8-4261-8a94-b56d1f490c56

git-svn-id: https://svn.baidu.com/idl/trunk/paddle@1416 1ad973e4-5ce8-4261-8a94-b56d1f490c56

ISSUE=4586865

git-svn-id: https://svn.baidu.com/idl/trunk/paddle@1415 1ad973e4-5ce8-4261-8a94-b56d1f490c56

ISSUE=4587205

git-svn-id: https://svn.baidu.com/idl/trunk/paddle@1414 1ad973e4-5ce8-4261-8a94-b56d1f490c56

ISSUE=4584581 

git-svn-id: https://svn.baidu.com/idl/trunk/paddle@1413 1ad973e4-5ce8-4261-8a94-b56d1f490c56

ISSUE=4587443


git-svn-id: https://svn.baidu.com/idl/trunk/paddle@1412 1ad973e4-5ce8-4261-8a94-b56d1f490c56

git-svn-id: https://svn.baidu.com/idl/trunk/paddle@1411 1ad973e4-5ce8-4261-8a94-b56d1f490c56

Also add some comments for cost layers.
ISSUE=4580653

git-svn-id: https://svn.baidu.com/idl/trunk/paddle@1410 1ad973e4-5ce8-4261-8a94-b56d1f490c56

ISSUE=4586769

git-svn-id: https://svn.baidu.com/idl/trunk/paddle@1409 1ad973e4-5ce8-4261-8a94-b56d1f490c56

ISSUE=4586495

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