[clang-format] first stab at a .clang-format file that matches the existing style

Not enabled by default, but if you want to use this one for now while
things are stabilized feel free. Going to move off astyle since this
seems to be superior now (wasn't always).

Also switched scripts/codestyle to use clang-format

.clang-format

@@ -0,0 +1,14 @@
+BasedOnStyle: LLVM
+IndentWidth: 4
+UseTab: Never
+PointerAlignment: Right
+InsertBraces: true
+BreakBeforeBraces: Attach
+AllowShortIfStatementsOnASingleLine: WithoutElse
+AllowShortLoopsOnASingleLine: true
+AllowShortFunctionsOnASingleLine: Inline
+ColumnLimit: 0
+IndentCaseLabels: true
+IndentGotoLabels: false
+AlignConsecutiveMacros:
+  Enabled: true

scripts/codestyle

@@ -1,13 +1,5 @@
 #!/bin/sh
 
-# formatting script using the astyle tool
+# formatting script using clang-format.
-# use -A2 (java style braces)
+# the format is described in .clang-format file at the root of the project.
-# 4 space indents, convert tabs to spaces
+clang-format --verbose -i $@
-#
-# switches documented at http://astyle.sourceforge.net/astyle.html
-#
-# optional switches to note:
-# --add-braces will add { } for every conditional, including one liners
-
-astyle -A2 --align-pointer=name --indent=spaces=4 --indent-switches \
-    --keep-one-line-blocks --pad-header --convert-tabs $@