Improve cabal file.

esqueleto.cabal

@@ -1,23 +1,53 @@
 name:                esqueleto
 version:             0.1
 synopsis:            Bare bones, type-safe EDSL for SQL queries on persistent backends.
--- description:
 homepage:            https://github.com/meteficha/esqueleto
 license:             BSD3
 license-file:        LICENSE
 author:              Felipe Lessa
 maintainer:          felipe.lessa@gmail.com
--- copyright:
+copyright:           (c) 2012 Felipe Almeida Lessa
 category:            Database
 build-type:          Simple
 cabal-version:       >=1.8
+description:
+  @persistent@ is a library for type-safe data serialization.  It
+  has many kinds of backends, such as SQL backends
+  (@persistent-mysql@, @persistent-postgresql@,
+  @persistent-sqlite@) and NoSQL backends (@persistent-mongoDB@).
+  .
+  While @persistent@ is a nice library for storing and retrieving
+  records, currently it has a poor interface for SQL backends
+  compared to SQL itself.  For example, it's extremely hard to do
+  a type-safe @JOIN@ on a many-to-one relation, and simply
+  impossible to do any other kinds of @JOIN@s (including for the
+  very common many-to-many relations).  Users have the option of
+  writing raw SQL, but that's error prone and not type-checked.
+  .
+  @esqueleto@ is a bare bones, type-safe EDSL for SQL queries
+  that works with unmodified @persistent@ SQL backends.  Its
+  language closely resembles SQL, so (a) you don't have to learn
+  new concepts, just new syntax, and (b) it's fairly easy to
+  predict the generated SQL and optimize it for your backend.
+  Most kinds of errors committed when writing SQL are caught as
+  compile-time errors---although it is possible to write
+  type-checked @esqueleto@ queries that fail at runtime.
+  .
+  Currently only @SELECT@s are supported.  Not all SQL features
+  are available, but most of them can be easily added (especially
+  functions), so please open an issue or send a pull request if
+  you need anything that is not covered by @esqueleto@ on
+  <https://github.com/meteficha/esqueleto/>.
+
+source-repository head
+  type:     git
+  location: git://github.com/meteficha/esqueleto.git
 
 library
   exposed-modules:
     Database.Esqueleto
     Database.Esqueleto.Internal.Language
     Database.Esqueleto.Internal.Sql
-  -- other-modules:
   build-depends:
       base          == 4.5.*
     , text          == 0.11.*