Release of 0.7.0

* Wed Feb 26 2020 Trevor Vaughan <tvaughan@onyxpoint.com> - 0.7.0
  - Changed name of module from libkv to simpkv

* Tue Oct 01 2019 Liz Nemsick <lnemsick.simp@gmail.com> - 0.7.0
  - Merged in changes released with 0.6.1 and on the 'develop' branch
  - Documented libkv requirements
    (See 'Requirements' section of docs/Design_Protoype2.md).
  - Created and documented design for second prototype
    (See 'Changes from Version 0.6.X' section of docs/Design_Protoype2.md).
  - Implemented second prototype and file plugin + store
    to demonstrate the design