Merge pull request #90 from js850/refactor

do a lot of small refactoring using pycharm
fix small issue with aasitetype

a variable that was used was not defined in __init__ which made things
pretty confusing
add .landscape.yaml
remove some binary and large files from the examples/amber
move examples/amber to playground/amber

amber is only semi-functional, so it should not be in the examples
folder.
small fix to .landscape.yaml
add the landscape badge to README.rst

also, fix some things in angle axis
update .landscape.yaml
add Minimum.id()

which is just an accessor for the private member _id.  Use the new
function throughout.  Same for TransitionState