Add files for examples implementation
Reset the distance computations if the precision or the epsilon are modified
Correct the files of the example
Improve the timestamp optimization
Remove useless variable
Move private to protected
Improve documentation
Provide the correct witness point at the scene
Finish the example source files

Add also some example data files
Add example descriptions
improve exception throwing
Correct documentation
Pass parameter by reference
 (thanks Travis)
Avoid some travis warnings
Indent the examples following allman style.
Merge pull request #2 from mehdi-benallegue/master

Add example files and various improvements