tweaked climatology calc function to return list of GRASS map names

switched from truncating to rounding mean LST back to integer

wrote function to download HDF files for given tile/year/day-range

wrote function to look up local HDF files for given tile/year/day-range

wrote function to encapsulate LST loading and QC-adjustment

added initial Python+GRASS code to download and aggregate daily LST

added script to reproduce calculation of 8-day LST from daily LST

added test script for days missing from our MOD11A1 OR holdings

cleaned up file permissions

added in various previously uncommitted scripts