Scaled ellipses

Up to this point we use scaled ellipses.

What's Changed

• RK4 and README by @sjboeing in #1
• Added optimised merging code by @sjboeing in #2
• Changing order of compilation (needed for compilation on my laptop) by @sjboeing in #3
• Fix 2d elliptic model by @matt-frey in #8
• Default choices for parameters by @matt-frey in #9
• Add python plotting tools by @matt-frey in #10
• write diagnostics to h5; fix bug in main model loop by @matt-frey in #12
• Animation with matplotlib by @matt-frey in #14
• write lambda parameter to h5; update python scripts by @matt-frey in #16
• Add halo cells by @matt-frey in #20
• fix step number of h5 writes by @matt-frey in #22
• Improve python scripts by @matt-frey in #23
• Add combine python script by @matt-frey in #24
• change signature of grid2par by @matt-frey in #19
• fix division by zero warning by @matt-frey in #30
• add disable-python-check flag by @matt-frey in #31
• Add merger module by @matt-frey in #32
• Alternative time stepping methods by @matt-frey in #27
• allow a single parcel by @matt-frey in #42
• Use periodic BCs when merging, apply parcel BCs after merge by @sjboeing in #36
• Small optimisations in merging procedure by @sjboeing in #39
• fix ellipse orientation if evec(1) = 0 and evec(2) = epsilon by @matt-frey in #41
• write integer step attribute; write number of parcels per step by @matt-frey in #46
• fix evec update by @matt-frey in #47
• Issue 5 by @sjboeing in #37
• Update number of time steps in h5 by @matt-frey in #49
• Towards serial MPIC by @matt-frey in #48
• Adjusting LS-RK4 setup to be in line with classic RK4 by @sjboeing in #56
• Convergence checks by @sjboeing in #57
• Time stepping optimisations by @sjboeing in #59
• remove nearest grid point interpolation by @matt-frey in #64
• Error in horizontal parcel distance by @matt-frey in #68
• Getting scalasca to work with epic by @matt-frey in #66
• Error in B matrix scaling and unit test for parcel split by @matt-frey in #71
• Revert to unscaled ellipses/ellipsoids by @matt-frey in #69

Full Changelog: https://github.com/matt-frey/epic/commits/0.1.0