v0.2.3

GeoParams v0.2.3

Diff since v0.2.0

Merged pull requests:

• implemented some new disl. creep laws + implemented DiffusionCreep (#2) (@Dr3ven)
• added macro to set aliases for functions to compute different parameters (#5) (@mcosarinsky)
• New methods for dislocation creep laws and fix test_DislocationCreep.jl (#6) (@albert-de-montserrat)