Initial version of the shells' dotfiles

- add config files for both bash and zsh
- as some utilities regard git to be present, git's config files
  are included as well

.bash_profile

@@ -0,0 +1,8 @@
+# Executed by bash when a login shell starts
+
+# Mimic bash's default behavior and source `~/.bash_login` next
+if [ -f "$HOME/.bash_login" ]; then
+    source "$HOME/.bash_login"
+else
+    source "$HOME/.profile"
+fi