v0.1.0

Groebner v0.1.0

Closed issues:

• make struct Hashvalue immutable (#2)
• Write simple docs page (#6)
• fix reducegb_f4 to work with noon systems (#7)
• Use f4 in isgroebner (#11)

Merged pull requests:

• Create LICENSE (#1) (@sumiya11)
• Create LICENSE (#9) (@sumiya11)
• initialize docs (#12) (@shashi)