Test symplecticity. Maybe we should check convergence in H at some point.
Merge branch 'master' into test-symplecticity
After pleroy's review
Merge pull request #91 from eggrobin/test-symplecticity

Test symplecticity. Maybe we should check convergence in H at some point...
Move in.
No forceinline.
Remove factories, add overloads.
A double for every function.
Double and Dimensionless are in a boat.
Test stats a little more.
Merge pull request #93 from eggrobin/test-stats

Test stats a little more.
Cleanup.
Lint.
After eggrobin's review.
Merge pull request #94 from pleroy/OptimizedQuantities

Optimize classes Quantities and Dimensionless