added SoftmaxCrossentropyIgnoreIndices loss. Added use_teacher_forcing flag

2 jobs for develop in 9 minutes and 32 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Windows
passed #541632
Windows10_OS
masterJobWindows

00:06:14

 
  Linux
passed #541633
BranchJobLinux

00:03:18