small fixes
all paths to external files are now relative to main geometry file
better messages to console if files not found
set internal dimension fields only after allocate returns successfully
more functions for dealing with platform specific file paths
now the 2d search works (at least as well as the 3d version)
updated macros from slates to delmar
changes slates to delmar
more entries about fracture and atomistic simulation
filling in more of guide
