improve functionality for windows 8

3.1.19

fixed problem of reading file when precision is large

3.1.18

	modified:   vgpmap_magic.py => fixed minor bug in -sav option

3.1.17

	modified:   vgpmap_magic.py => added -sav option

3.1.16

	modified:   igrf.py => recalculated models to 10 yr increments and a…

…dded pfm9k.1b

	modified:   pmag.py => recalculated models to 10 yr increments and added pfm9k.1b

3.1.15: modified: cont_rot.py => added -sav option

	modified:   vgpmap_magic.py => added -sav option

Minor bug fixes and new Essentials_Examples files in Datafiles

3.1.14

	modified:   strip_magic.py => added the -sav option

3.1.13: modified: plot_mapPTS.py => added -sav option

	modified:   pmag.py

3.1.12

	modified:   igrf.py => fixed -F option

3.1.11

	modified:   igrf.py => fixed default model to cals3k

3.1.10: modified: find_EI.py => added the -sav option

	modified:   ipmag.py => added squish and unsquish
 	modified:   pmagplotlib.py => tried to get rid of all the draws()
 	modified:   zeq.py