Add .gitconfig file (#3)

Author: slavcodev

.gitconfig

@@ -0,0 +1,14 @@
+# Git config file extending local configuration.
+# Should be added to local config:
+# ~~~
+# git config --local --add include.path ../.gitconfig
+# ~~~
+
+# Configure "pre-commit" hook.
+# Requires https://github.com/slavcodev/git-hooks
+[hooks "pre-commit"]
+  disallow-commits = disallow-commits/disallow-commits
+
+# Disallow mistakenly commits to master.
+[disallow-commits]
+  branch = master