travis2bash.sh configuragble config file

- passing an argument to travis2bash.sh allows to use a custom config
  file instead of the default .travis.yml

travis2bash.sh

@@ -6,6 +6,7 @@
 # Based on https://gist.github.com/pkuczynski/8665367
 
 failure=0
+config_file=.travis.yml
 
 parse_yaml() {
     local yaml_file=$1
@@ -56,8 +57,12 @@ create_variables() {
     eval "$(parse_yaml "$yaml_file" "$prefix")"
 }
 
-if [ ! -e .travis.yml ]; then
-    echo "No .travis.yml found, exiting"
+if [ -n "$1" ]; then
+    config_file="$1"
+fi
+
+if [ ! -e "$config_file" ]; then
+    echo "No $config_file found, exiting"
     exit 1
 fi
 
@@ -150,7 +155,7 @@ function python_run() {
     fi
 }
 
-create_variables .travis.yml travis_
+create_variables "$config_file" travis_
 
 rundir=$(pwd)