scripts: clean up whitespace
require py2.7, remove argparse from install_requires

since argparse is part of the stdlib starting with py2.7
fxa-vectors: prepare for main()-ification

no functional changes, just indentation
fxa-vectors: more main()-ification
fxa-vectors: add whitespace
move bin/fxa-vectors to a library module
fix entrypoints and imports to make fxa_vectors work
install scrypt with install_requires, not Makefile
Makefile: whitespace changes
Makefile: fix 'vectors' target
Merge branch 'pr13d'