Add .editorconfig properties for formatting (code style)

IDEA and some other editors support this format by default, see here:
http://editorconfig.org/

Author: robinst

.editorconfig

@@ -0,0 +1,11 @@
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+charset = utf-8
+
+[*.java]
+indent_style = space
+indent_size = 4
+continuation_indent_size = 8