Update aksetup
FIX: no more explicit padding required for vectors

Additionally, relying on default values for initialization triggers a
deprecation warning. Added three more vector constructors: filled_ which fills
the entire vector with a given value, zeros_ and ones_.

Closes #28
Merge pull request #30 from pohlt/master

FIX: no more explicit padding required for vectors
Minor fixes to Tom's patch
Minor doc update
Merge branch 'master' into cffi
Make cffi_cl flake8-clean
Fix memory pool tests to not rely on deprecated functionality
Make cffi branch livable, implement memory pools
Fix memory pool tests to not rely on deprecated functionality
Merge branch 'master' into cffi