Simox install doesn't need ros_user

Just use a tmp directory to build simox, then install it. No need to link to
ros_user, just adds dep pain.
Test for existing simox install.
Test for remote before adding.

Stops it failing when the remote exists.
Merge pull request #85 from shadow-robot/B_simox_needs_ros_user

B simox needs ros user
Merge pull request #86 from shadow-robot/B_add_kcl_remote

Test for remote before adding.
Simox install needs subversion.
Install postgres with ronex user.
Install db settings.
Add the auth data.
Clean up comments
Cleanup and more vars.
Fix for pgauth. Var names.

Uses nested arg names.
Merge pull request #89 from shadow-robot/f_ronex_postgres

F ronex postgres
adding a indigo rosinstall
Merge pull request #90 from shadow-robot/F_indigo_devel

adding a indigo rosinstall
Small doc add.
Add README for ros-base.
Remove base image stuff and tweaks.

* Base image docs now in ros-base/README.md.
* Simplify ansible install section.
* Better examples.
Fix example.
Cleanup example.