* Move runtime::Manager functionality into runtime::Backend

* Remove unused files

* remove obsolete function

* remove deprecated

* remove all legacy Backend API usage

remove deprecated files

* pull in changes from master

* fix GPU calls

* disable tests in convolution generator

* update per PR comments. Enable performance counter feature.

* update per PR comments

* fix build error

* fix conditionally compiled test :(

* add random init for all input types, not just float

* remove debug

Adjust CallFrame argument order to match Function

* fix detailed timing flag

* more detailed info

* cleanup

* cleanup

* fix all headers to be standalone as far as includes go

* include cleanup

* cleanup includes

* cleanup

* include tester

* wip

* cleanup

* cleanup

* cleanup

This fixes the previously broken compilation of ngraph-mxnet which directly utilized serializer.hpp