added test for st_graph_boundary, exit when path length is smaller than reference line length. (#395)

* added test for st_graph_boundary

* exit when path length is smaller than reference line length.

* fixed compilation error.

* add timer for perception

* merge conflict

* [perception] Add bazel build for Caffe

* [perception] (1) Update docker image to support bazel-built Caffe; (2) fix bugs in unit tests.

* update hm tracker test data

* fixed hm tracker test

* fixed some compling warnings

* fixed some compling warnings of hm tracker

* clean spaces

* fixed codetyle of some common files

* push test

* trim code

* trim code and add comments