Changed pad1 to DERIVATIVE_ORDER
Changed pad1 to TILE_PAD
Changed test to have padding = 3
Temporarily disable ghost cell in output
Changed test case to conform to new modification
Removed sim.conf from repo and added it as example
Changed gitignore to reflect sim.conf
Merge branch 'workstation' into home
Changed example to a more conservative value
Added extrapolation for the boundary values
Added special case for numDevices = 1
Turned down default max particle number
Removed main.cpp from the repo, for easier change
Fixed the way of dividing scale factors
Removed a debug message
Removed another debug message