Once encoutering a single sample whose size is larger than batch size,
the provider will yield empty batch and terminate the current pass unexpectedly
if can_over_batch_size=False.

priorbox layer for Single Shot Multibox Detection Network

Support user specified label input in tests

Remove not used params in GradientMachine::start

Fix bug in config_parse.py when batch_norm layer is used in RecurrentLayerGroup

travis for check broken links

Remove unused cost parameter in ParameterUpdater

change float to real in two tests

support UBUNTU MIRROR and modify doc

Cmrnorm

Matrix API refactor

Add const in ParameterUpdater init

Change float in test_ConvTrans and test_ConvUnify to real.

Add excluded_chunk_types to ChunkEvaluator

The chunks of types in excluded_chunk_types will not be counted in
ChunkEvaluator. This is useful for tasks such as SRL, in which chunks of
type V (verb) will not be taken into account in evaluation.

Add unittest to cover SgdThreadUpdater's enableBufType

Synchronic code from PaddlePaddle/Paddle