Better describe why this library exists. Refs #5
Make this a heading
Better gramar
Document that we want AES-GCM
Added another item from hynek
Merge branch 'master' into why-cryptography

Conflicts:
	README.rst
English grammar
Another issue we're targetting
Merge pull request #38 from alex/why-cryptography

Better describe why this library exists. Refs #5
Merge remote-tracking branch 'upstream/master'