Update CONTRIBUTING.md
Update CONTRIBUTING.md

 * Fixed formatting that somehow slipped through the cracks during the PR review.
 * Updated the TOC with gh-md-toc --insert CONTRIBUTING.md

freedomtan/tensorflow,gautam1858/tensorflow,Intel-tensorflow/tensorflow,annarev/tensorflow,tensorflow/tensorflow-pywrap_saved_model,davidzchen/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,sarvex/tensorflow,yongtang/tensorflow,frreiss/tensorflow-fred,davidzchen/tensorflow,freedomtan/tensorflow,cxxgtxy/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,paolodedios/tensorflow,gautam1858/tensorflow,karllessard/tensorflow,aam-at/tensorflow,Intel-tensorflow/tensorflow,aam-at/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,sarvex/tensorflow,karllessard/tensorflow,tensorflow/tensorflow-pywrap_saved_model,annarev/tensorflow,gautam1858/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,karllessard/tensorflow,frreiss/tensorflow-fred,yongtang/tensorflow,davidzchen/tensorflow,annarev/tensorflow,petewarden/tensorflow,aam-at/tensorflow,annarev/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,frreiss/tensorflow-fred,tensorflow/tensorflow-experimental_link_static_libraries_once,sarvex/tensorflow,paolodedios/tensorflow,petewarden/tensorflow,davidzchen/tensorflow,karllessard/tensorflow,yongtang/tensorflow,paolodedios/tensorflow,annarev/tensorflow,tensorflow/tensorflow,tensorflow/tensorflow-pywrap_saved_model,petewarden/tensorflow,karllessard/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,yongtang/tensorflow,aam-at/tensorflow,freedomtan/tensorflow,annarev/tensorflow,Intel-tensorflow/tensorflow,tensorflow/tensorflow-pywrap_saved_model,aam-at/tensorflow,aam-at/tensorflow,aam-at/tensorflow,gautam1858/tensorflow,annarev/tensorflow,gautam1858/tensorflow,paolodedios/tensorflow,frreiss/tensorflow-fred,Intel-tensorflow/tensorflow,davidzchen/tensorflow,gautam1858/tensorflow,frreiss/tensorflow-fred,Intel-Corporation/tensorflow,karllessard/tensorflow,freedomtan/tensorflow,cxxgtxy/tensorflow,cxxgtxy/tensorflow,Intel-tensorflow/tensorflow,tensorflow/tensorflow-pywrap_saved_model,petewarden/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,annarev/tensorflow,frreiss/tensorflow-fred,petewarden/tensorflow,yongtang/tensorflow,petewarden/tensorflow,davidzchen/tensorflow,cxxgtxy/tensorflow,davidzchen/tensorflow,karllessard/tensorflow,Intel-tensorflow/tensorflow,sarvex/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,tensorflow/tensorflow-experimental_link_static_libraries_once,tensorflow/tensorflow,tensorflow/tensorflow,davidzchen/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,tensorflow/tensorflow-experimental_link_static_libraries_once,tensorflow/tensorflow,Intel-tensorflow/tensorflow,annarev/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,annarev/tensorflow,paolodedios/tensorflow,petewarden/tensorflow,Intel-Corporation/tensorflow,aam-at/tensorflow,Intel-Corporation/tensorflow,yongtang/tensorflow,yongtang/tensorflow,Intel-tensorflow/tensorflow,davidzchen/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,Intel-tensorflow/tensorflow,gautam1858/tensorflow,Intel-Corporation/tensorflow,frreiss/tensorflow-fred,petewarden/tensorflow,freedomtan/tensorflow,freedomtan/tensorflow,gautam1858/tensorflow,Intel-Corporation/tensorflow,karllessard/tensorflow,paolodedios/tensorflow,cxxgtxy/tensorflow,aam-at/tensorflow,gautam1858/tensorflow,paolodedios/tensorflow,Intel-tensorflow/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,tensorflow/tensorflow-pywrap_saved_model,karllessard/tensorflow,tensorflow/tensorflow,paolodedios/tensorflow,paolodedios/tensorflow,aam-at/tensorflow,Intel-tensorflow/tensorflow,frreiss/tensorflow-fred,davidzchen/tensorflow,frreiss/tensorflow-fred,sarvex/tensorflow,tensorflow/tensorflow,petewarden/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,tensorflow/tensorflow,aam-at/tensorflow,cxxgtxy/tensorflow,frreiss/tensorflow-fred,tensorflow/tensorflow-pywrap_tf_optimizer,karllessard/tensorflow,frreiss/tensorflow-fred,yongtang/tensorflow,tensorflow/tensorflow-pywrap_saved_model,freedomtan/tensorflow,gautam1858/tensorflow,tensorflow/tensorflow-pywrap_saved_model,tensorflow/tensorflow,petewarden/tensorflow,aam-at/tensorflow,cxxgtxy/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,davidzchen/tensorflow,freedomtan/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,yongtang/tensorflow,freedomtan/tensorflow,freedomtan/tensorflow,sarvex/tensorflow,tensorflow/tensorflow-pywrap_saved_model,gautam1858/tensorflow,frreiss/tensorflow-fred,petewarden/tensorflow,annarev/tensorflow,tensorflow/tensorflow,sarvex/tensorflow,karllessard/tensorflow,yongtang/tensorflow,tensorflow/tensorflow-pywrap_saved_model,Intel-Corporation/tensorflow,Intel-Corporation/tensorflow,davidzchen/tensorflow,paolodedios/tensorflow,freedomtan/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,yongtang/tensorflow,tensorflow/tensorflow-pywrap_saved_model,paolodedios/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,tensorflow/tensorflow,petewarden/tensorflow,gautam1858/tensorflow,sarvex/tensorflow,Intel-Corporation/tensorflow,cxxgtxy/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,freedomtan/tensorflow,tensorflow/tensorflow