feature: shell function to change directory in workspace

[wkentaro]

I created shell function to change directory in workspace which is managed by wstool.
Using this function, it is easy to change directory in wstool workspace.
See: https://github.com/wkentaro/wstool_cd

Feature:

• cd to workspace's root with no arguments
• wstool_cd LOCALNAME to cd to repository which is set as LOCALNAME
• supports bash and zsh completion

for ROS user, this is useful when doint cd to repository which is not yet catkin compiled (when unable to roscd).

If possible, I hope this script wstool_cd.sh is merged to https://github.com/vcstools/wstool , and let users enable wstool_cd just with source $(which wstool_cd.sh) in shell after installing wstool.

What do you think?

[dirk-thomas]

Closing since the repository is about to be archived: see #154.