Merge pull request PaddlePaddle#6435 from jacquesqiao/update-release-…

…note-v0.11.0

Update release note v0.11.0

have report version

use openmp to speedup SgdOptimizer when use MKL-DNN

Can run googletnet, resnet, vgg on KNL

initialed MKLDNN ds2, can run ds2, but not actually work correctly

can run my model with fixed input length, blocked by framework itself

Merge pull request PaddlePaddle#1808 from QiJune/feature/fix_build_er…

…ror_with_clang

fix build error with clang

support alexnet, googlenet_v1, vgg and resnet

Merge pull request PaddlePaddle#1646 from luotao1/compile

update sphinx cmake

let MKLDNN choose the best format, using any format.