Added useful dev files

.clang-format

@@ -0,0 +1,4 @@
+IndentWidth: '4'
+TabWidth: '4'
+UseTab: Always
+ColumnLimit: 120

useful_files/git-hooks/install.sh

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+ROOT=`git rev-parse --show-toplevel`
+cp * $ROOT/.git/hooks

useful_files/git-hooks/pre-commit

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+#!/bin/sh
+
+DIRNAME=`dirname "$0"`
+python2.7 $DIRNAME/pre-commit.py $@

useful_files/git-hooks/pre-commit.py

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+import subprocess
+
+try:
+    run_args = ["git", "clang-format"]
+
+    print("Running clang-format...")
+    output = subprocess.check_output(run_args)
+    print output
+    changed_list = output.split('\n')
+    if changed_list[0] == 'changed files:':
+        changed_list.pop(0)
+        for changed in changed_list:
+            if len(changed.strip()) > 0:
+                add_output = subprocess.check_output(['git', 'add', changed.strip()])
+                if len(add_output) > 0:
+                    print(add_output)
+    exit(0)
+except subprocess.CalledProcessError as e:
+    print(e.output)
+    exit(1)
+except Exception as e:
+    print "Clang format not installed; please install: ", e
+    exit(0)