Add .editorconfig file

Ensure indentation/spacing are explicitly defined via this format.

Change-Id: If8659482d7acba0065069436e4c37874fcd27885
Reviewed-on: http://gerrit.causes.com/44915
Tested-by: jenkins <jenkins@brigade.com>
Reviewed-by: Shane da Silva <shane.dasilva@brigade.com>

Author: sds

.editorconfig

@@ -0,0 +1,11 @@
+# Defines the coding style for different editors and IDEs.
+# http://editorconfig.org
+
+root = true
+
+[*]
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+indent_style = space
+indent_size = 2