fix wrong information in charts.
clean up log files on chart.
fix the error on clean-chart.
The files other than 1700 were not removed.
fix the color on experimental1 which is "Ht of Critical Updraft Strength (175fpm).
Change the scale of Hcrit.
show PDT on daylight saving time.
fix wrong forecast period in PDT.
Merge branch 'master' into 1200z-0400pst

Conflicts:
	GM/Makefile