Support for heroku (#75)

* Create composer.json

added composer.json with mbstring for heroku support

* Update .gitignore

Added heroku's entries to the gitignore file

* Update composer.json

.gitignore

@@ -5,6 +5,9 @@ admin/
 cache/
 !/cache/.htaccess
 
+# Heroku specific entries
+vendor/
+.env
 
 # Created by https://www.gitignore.io/api/osx,linux,windows,phpstorm,sublimetext
 

composer.json

@@ -0,0 +1,6 @@
+{
+  "require" : {
+	"php" : "^5.5",
+	"ext-mbstring": "*"
+  }
+}