* various fixes to ContextGraph to support open vocabulary keywords decoder
* Add keyword spotter runtime
* Add binary
* First version works
* Minor fixes
* update text2token
* default values
* Add jni for kws
* add kws android project
* Minor fixes
* Remove unused interface
* Minor fixes
* Add workflow
* handle extra info in texts
* Minor fixes
* Add more comments
* Fix ci
* fix cpp style
* Add input box in android demo so that users can specify their keywords
* Fix cpp style
* Fix comments
* Minor fixes
* Minor fixes
* minor fixes
* Minor fixes
* Minor fixes
* Add CI
* Fix code style
* cpplint
* Fix comments
* Fix error