release icesprog v1.1b

release icesprog 1.1b, typo fix and some desc msg optimize

release icesprog v1.1a

there are some funny new feature in v1.1:

1. add gpio control
2. add jtag select (for iCESugar-pro)
3. add fpga clk select (for iCESugar-nano)

release iCESugar v1.5

iCESugar v1.5