Added rtd docs theme to tox build.
Removed use of autodocs for nacl.public module.
Updated Box.decode() with proper description.
Removed use of autodocs for nacl.secret module.
Removed use of autodocs for nacl.signing module.
Merge pull request #77 from Ayrx/fix-nacl-signing-docs

Removed use of autodocs for nacl.signing module
Merge pull request #76 from Ayrx/fix-nacl-secret-docs

Removed use of autodocs for nacl.secret module
Merge pull request #75 from Ayrx/fix-docs

Convert nacl.public docs
Merge branch 'master' into doc8

Conflicts:
	docs/secret.rst
	docs/signing.rst
Refix