Add formatting/static analysis (#486)

* Reform source with clang-format.

Rules applied with:
    $ find . -iname *.h -o -iname *.cc | xargs clang-format \
        -style=file -i -fallback-style=google

* Add clang-format and analyze to build.

Based on the excellent work at: https://github.com/ttroy50/cmake-examples

* Clean up CMake stuff on macOS.

* Remove vim/emacs modelines.

* Update copyright dates.

* Build fixes.

* Build fixes.

* Build fixes.

* Build fixes.

* Build fixes.

* Build fixes.

cmake/scripts/clang-format-check-changed

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+# Required because cmake root isn't git root in this example
+CLANG_FORMAT_BIN=$1
+GIT_ROOT=`git rev-parse --show-toplevel`
+
+pushd ${GIT_ROOT} > /dev/null
+
+git status --porcelain \
+	| egrep '*\.cpp|*\.h|*\.cxx|*\.hxx|*\.hpp|*\.cc' \
+	| awk -F " " '{print $NF}' \
+	| xargs -r ${CLANG_FORMAT_BIN} -style=file -output-replacements-xml \
+	| grep "replacement offset" 2>&1 > /dev/null
+
+RET=$?
+popd > /dev/null
+
+exit ${RET}