add .editorconfig to standardise formatting http://editorconfig.org

supported by most major IDEs

Author: Lance Reid

.editorconfig

@@ -0,0 +1,21 @@
+# Based on: http://editorconfig.org/#example-file
+
+root = true
+
+# Unix-style newlines with a newline ending every file
+[*]
+end_of_line = lf
+insert_final_newline = true
+
+[*]
+charset = utf-8
+
+# 4 space indentation
+[*.{java,xml,xsd}]
+indent_style = space
+indent_size = 4
+
+# 2 space indentation
+[*.{js,css,html}]
+indent_style = space
+indent_size = 2