Update debug print for log_to_yaml.
Install log_to_yaml.py.
Re-organize the project.

- standalone binaries should be not be installed as Python modules
- remove simple.py as it is not relevant anymore
- update root CMakeLists.txt to install binaries in bin directory
Merge pull request #2 from thomas-moulard/master

Re-organize the project.
Add first draft of capsule display.
Use roboptim-capsule's capsule generator for display.
capsule_display: fix R.
capsule_display: add CLI Collada support.
capsule_display: display both initial guess and solution capsule.
log_to_yaml: only export result if the optimal solution was found.

See roboptim/roboptim-core#56
capsule_display: add the possibility to choose the solver (ipopt, nlopt, etc.).