Check whole code for consistency and efficiency

[svenstaro]

This should be done shortly before release of 0.1 because we have many inconsistencies, undocumented pieces of code and some sub optimal expressions (like many copy constructors).

Also check includes and move all includes that are only required in the .cpp to there. Keep includes that are required in both files in the header only. There are tools to suggest this automatically.

This should also be used to profile the code and check for any bottlenecks.

Depends on #12. [done]

• inconsistencies
• undocmented code [done]
• copy constructors [done]
• memory leaks [done]
• const-correctness
• use move operators where appropriate
• use callgrind

[opatut]

Watch out, you will not want to move all ´´´#include "Root.hpp"´´´ the the headers for circular dependency reasons.

[svenstaro]

Good point.

[svenstaro]

All includes should be ordered the opposite way of what they are ordered now were ordered before. A good reasoning about that here.

[svenstaro]

Added note about move operators.