Improve a few travis related things

* cache the MPI build results * add the travis badge to the readme
Collegeville · Feb 20, 2019 · acc942b · acc942b
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diff --git a/.travis.yml b/.travis.yml
@@ -21,6 +21,10 @@ notifications:
     on_failure: always
 
 
+cache:
+  directories:
+    - /home/travis/.julia/packages/MPI/
+
 #MPI.jl needs mpi binaries plus compilers avalible 
 addons:
   apt:

diff --git a/README.md b/README.md
@@ -1,5 +1,7 @@
 # JuliaPetra
 
+[![Build Status](https://travis-ci.org/Collegeville/JuliaPetra.jl.svg?branch=master)](https://travis-ci.org/Collegeville/JuliaPetra.jl)
+
 This is an implmentation of the Petra Object Model in Julia.
 It is a basic framework for sparse linear algebra