v0.4

#32 - surface2hasc printing out raster geometries
#31 - surface2hasc module import adapted to Python 3
#30 - surface2hasc now taking full module path as input
#29 - accomodating different behaviour of math.ceil on Python 2.7
#28 - checking for exception when saving output in asc2hasc
#27 - fixed header reading method in HASC class
#26 - corrected interpolation method in asc2hasc

. Implements angle rotation

. Adds csv2hasc
. Consolidates mesh geometry computation - initWithExtent
. Consolidates argument parsing
. Improves class naming: Grid -> Raster

Improves install assets and instructions.

Added surface package and corresponding scripts. Milestone details: h…

…ttps://github.com/ldesousa/hex-utils/milestone/1?closed=1

Distribution with Python 3.

Transforming HASC into GML using inputs from command line.