Added script to install dependencies like xmloutput plugin

Author: santhanakarthikeyan

.install_dependencies.sh

@@ -0,0 +1,13 @@
+#/usr/bin/env sh
+
+bazaar_plugins_path=`bzr --version |  awk '/bzrlib:/ {print $2}'`
+
+cd "$bazaar_plugins_path/plugins"
+
+sudo bzr branch lp:bzr-xmloutput
+
+sudo mv bzr-xmloutput xmloutput
+
+cd xmloutput
+
+python setup.py build_ext -i

.travis.yml

@@ -1,2 +1,4 @@
 language: ruby
-install: gem install posix-spawn
+install:
+  - gem install posix-spawn
+  - sh .install_dependencies.sh