Write script for formatting code

.clang-format

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+---
+BasedOnStyle: WebKit
+AlignAfterOpenBracket: AlwaysBreak
+AlignConsecutiveMacros: false
+AlignConsecutiveAssignments: false
+AlignConsecutiveDeclarations: false
+AlignEscapedNewlines: DontAlign
+AlignOperands: false
+AlignTrailingComments: false
+TabWidth: 4
+UseTab: ForIndentation
+DerivePointerAlignment: false
+PointerAlignment: Right
+BinPackArguments: true
+BinPackParameters: true
+ExperimentalAutoDetectBinPacking: false
+AllowAllArgumentsOnNextLine: true
+AllowAllParametersOfDeclarationOnNextLine: false
+AllowShortFunctionsOnASingleLine: None
+ColumnLimit: 77
+...

scripts/format.sh

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+cd "$(git rev-parse --show-toplevel)"
+find . -not \( -path './.git' -prune \) \
+	 -not \( -path './build' -prune \) \
+	 -name '*.c' -o -name '*.h' \
+	| xargs -n 1 clang-format -i