Merge branch 'dev'

* dev:
  fix types
  update docs for v0.7.0
  update logo
  skylark init in examples
  rename curd to skylark in snippets and samples
  update .gitignore
  typoes
  add the simple logo
  add the simple logo
  rename curd.py to skylark in readme.md
  upgrade to v0.7.0: renamed to skylark
  rename curd.py to skylark in all tests codes
  rename curd.py to skylark in setup.py
  typofix
  rename curd.py to skylark
use new logo!