simplify readme layout

README

@@ -16,15 +16,11 @@ Released under GPL version 3 or later.
 Installation
 ------------
 hledger requires GHC. It is known to build with 6.8 and 6.10.
+If you have cabal-install, do::
 
-Installing with cabal
-.....................
-If you have cabal-install, in this directory do::
+ cabal update
+ cabal install hledger
 
- cabal install
-
-Installing manually
-...................
 Otherwise, unpack the latest tarball from
 http://hackage.haskell.org/cgi-bin/hackage-scripts/package/hledger and do::
 
@@ -36,14 +32,10 @@ This will complain about any missing libraries, which you can download and
 install manually from hackage.haskell.org. (The Build-Depends: in
 hledger.cabal has the full package list.)
 
-Caveat
-......
-The current vty library requires ghc 6.10 to build, so if you are using
-ghc 6.8 you will need to use vty 3.1.2.
+Caveat to the above: the current vty library requires ghc 6.10 to build,
+so if you are using ghc 6.8 you will need to use vty 3.1.2.
 
-Latest development code
-.......................
-Or, to get the latest development code do::
+To get the latest development code do::
 
  darcs get http://joyful.com/repos/hledger