Rename .tools to .mystools for Arduino IDE (#686)

* The Arduino IDE considers the .tools directory
special and warns if it finds .tools the repo

References #672

.mystools/hooks/pre-commit.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+
+# instantiate mysensors tool runtime shim
+. "$(git mystoolspath).bundle_runtime.sh"
+
+###
+#  astyle 
+#
+errorsDetected=0
+for file in $(stagedSourceFiles); do
+	git astyle $file >/dev/null
+	if ! git diff-files --quiet $file >&2; then
+		warn "$file has been updated to match the MySensors core coding style."
+		errorsDetected=1
+	fi
+done
+
+[ $errorsDetected == 1 ] && err "Styling updates applied. Review the changes and use 'git add' to update your staged files."
+
+###
+#  cppcheck
+#
+errorsDetected=0
+for file in $(stagedSourceFiles); do
+	if ! git cppcheck $file >/dev/null; then
+		warn "$file failed static analysis."
+		errorsDetected=1
+	fi
+done
+
+[ $errorsDetected == 1 ] && err "Correct the errors until cppcheck passees using 'git cppcheck --cached'."
+
+exit 0