Clean up the Cabal file, and move library source to lib/.

gnutls.cabal

@@ -1,15 +1,17 @@
 name: gnutls
 version: 0.1.0.1
-stability: experimental
-synopsis: Bindings for GNU TLS
 license: GPL-3
 license-file: license.txt
-author: John Millikin
-maintainer: jmillikin@gmail.com
+author: John Millikin <jmillikin@gmail.com>
+maintainer: John Millikin <jmillikin@gmail.com>
 build-type: Simple
 cabal-version: >=1.6
 category: Network
+stability: experimental
+homepage: https://john-millikin.com/software/haskell-gnutls/
+bug-reports: mailto:jmillikin@gmail.com
 
+synopsis: Bindings for GNU TLS
 description:
   You almost certainly don't want to depend on this release.
   .
@@ -17,8 +19,18 @@ description:
   TLS support in some of my other libraries. More complete bindings for GNU TLS
   will be released at a later date.
 
+source-repository head
+  type: bazaar
+  location: https://john-millikin.com/branches/haskell-gnutls/0.1/
+
+source-repository this
+  type: bazaar
+  location: https://john-millikin.com/branches/haskell-gnutls/0.1/
+  tag: anansi_0.1.0.1
+
 library
-  ghc-options: -Wall
+  hs-source-dirs: lib
+  ghc-options: -Wall -O2
 
   build-depends:
       base >=3 && < 5