Add astyle specification

.astylerc

@@ -0,0 +1,23 @@
+--style=google
+--keep-one-line-blocks
+
+--indent=spaces=2
+--indent-preproc-block
+--indent-preproc-define
+--indent-col1-comments
+
+--remove-brackets
+--break-after-logical
+--delete-empty-lines
+
+--pad-oper
+--pad-header
+--unpad-paren
+--align-pointer=type
+--align-reference=type
+
+--attach-classes
+--attach-inlines
+--keep-one-line-statements
+
+--indent-namespaces