* Add functionality for turn signals

Prior to this commit there was no turn signal functionality in the teleop demo. This commit adds that functionality.

* Fix bug in turn signal command reset

Prior to this commit there was a bug in the turn signal reset command. This commit fixes that issue.

* Update with style changes

Prior to this commit there were issues with style in the teleop code. This commit fixes those issues.

* Lint fixes

Had a couple lint issues which this resolves.

* Perception: enable lane tracking by history. Function OK, parameter tuning needed

* Perception(In progress): lane post processor with history smooth

* XPerception: enable lane history smooting for lane post processing

* modify Dag config, move motion service to upper level of the DAG

* perception: add mutex to motion service. Motion service now callback on image/localization. Support looping and waiting, sudden drop of frames, etc.

* Perception: add different strategies to handle lane tracking, with callback on motion: (1)motion arrives earlier (2) motion later (3) motion not found. (4)motion drop (5) image drop. etc

* it dupliates with existing planning functions
* it creates code logic diff between different perception configurations

planning: restructured trajectory_evaluator; removed unused functions in backup_trajectory_generator

* move map collection document to quick start

* update map collection guide

* update map collection document

add imu vehicle calibration tool, also add ceres-solver to docker file. note that, the ceres solver version provided by apt is 1.8.

Perception: Changed README2.5 to README; Added links of perception algorithms and sensor installation guideline