Added time stepping selection parameter.
Working version of explicit euler
Working version of Runge-Kutta
Added a few extra comments
Added new initial flow field
Added working version of Taylor Vortex
Begin of boundary conditions in classes
Added a directory structure for the testcases.
Add warning if there are uncommited changes
Changed the initialization in Taylor_Vortex to the good Velocity and Pressure fields
Add output to screen if a solution file is written.
Working version of time-dependent boundary conditions for one direction
Working version with time and space varying boundary conditions
Merge branch 'time_dependent_BC_class' into Taylor_Vortex
Removed error in apply boundary condition call and removed some redundant files
Removed temporary print statements for actual time and removed some redundant files
Changed the fucntion call of apply boundary condition with the exact actual time
Corrected the coordinate calculation
Corrected the actual time in apply_boundary_condition in the RK-scheme
Corrected the time step parameter in Runge Kutta and added some extra comments. Also excluded logfiles from git