Add Travis-CI script & README

Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>

.travis.yml

+env:
+ - GHCVER=7.4.1
+ - GHCVER=7.4.2
+ - GHCVER=7.6.1
+ - GHCVER=7.6.2
+ - GHCVER=7.6.3
+ - GHCVER=head
+
+matrix:
+  allow_failures:
+   - env: GHCVER=head
+
+before_install:
+ - sudo add-apt-repository -y ppa:hvr/ghc
+ - sudo apt-get update
+ - sudo apt-get install cabal-install-1.18 ghc-$GHCVER
+ - export PATH=/opt/ghc/$GHCVER/bin:$PATH
+
+install:
+ - cabal-1.18 update
+ - ghc --version
+
+script:
+ - cabal-1.18 configure -v2
+ - cabal-1.18 build
+ - cabal-1.18 check
+ - cabal-1.18 sdist
+ - export SRC_TGZ=$(cabal-1.18 info . | awk '{print $2 ".tar.gz";exit}') ;
+   cd dist/;
+   if [ -f "$SRC_TGZ" ]; then
+      cabal-1.18 install "$SRC_TGZ";
+   else
+      echo "expected '$SRC_TGZ' not found";
+      exit 1;
+   fi

README.md

+The `array` Package  [![Build Status](https://travis-ci.org/ghc/packages-array.png?branch=master)](https://travis-ci.org/ghc/packages-array)
+===================
+
+See [`array` on Hackage](http://hackage.haskell.org/package/array) for more information.

array.cabal

@@ -13,6 +13,7 @@ description:
     some instances of these classes.
 cabal-version: >=1.10
 build-type: Simple
+tested-with: GHC==7.6.3, GHC==7.6.2, GHC==7.6.1, GHC==7.4.2, GHC==7.4.1
 
 extra-source-files: changelog