* fix glog

* sync logging improvement from dmlc

* Remove backward index, use gradient guessing instead

* minor fix

* bugfix

* Enable optional dependency memory and attr hint

* fix travis

* [SYMBOL] Change list_input->list_input_names, add list_input_variables

* fix

* [OP] Enable register via match tag

* more docs on usage

* [SYMBOL] support control deps in API

* enable more generic tuple list

* fix

* fix

* Allow libaray path to be configurable

* Enable partial shape inference result to be passed via shape

* fix python3

* disallow copy assign in index

* ApplyPass -> ApplyPasses; Refactored infer pass;

* lint fix

* Enable Alias, refactor C API to reflect Op Semantics

* add alias example

* chomo

* try mac options

* trigger travis

* fix

* chomo

* make

* squash

* overview

* fix