Fix #11 and some performannce increase
Merge branch 'master' of github.com:bnoi/scikit-tracker
changed small comment
Rename trajectories_generator in directed_trajectories_generator
Fix #13 implement the `Trajectories` `DataFrame` subclass
Merge branch 'master' of github.com:bnoi/scikit-tracker
Start directed motion solver
Merge branch 'master' of github.com:bnoi/scikit-tracker