Keypoints for building msckf_mono

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1. Requirements

(1) ROS Kinetic
(2) OpenCV
(3) Boost
(4) Eigen
(5) fast

$ git clone https://github.com/uzh-rpg/fast
$ cd fast
$ mdkir build
$ cd build
$ cmake ..
$ make

2. Compile

$ cd ANY_PATH
$ mkdir catkin_ws 
$ cd catkin_ws 
$ mkdir src
$ cd src  

$ git clone https://github.com/daniilidis-group/msckf_mono
$ cd ANY_PATH/catkin_ws 
$ catkin_make 
$ source devel/setup.bash

*Solution for the fatal error: msckf_mono/StageTiming.h: No such file or directory [2]

Reference:
[1] https://github.com/daniilidis-group/msckf_mono
[2] https://github.com/daniilidis-group/msckf_mono/issues/21
[3] csdn blog

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