Extract shebang configs to a yaml file

lib/linguist/shebangs.yml

@@ -0,0 +1,25 @@
+# Maps shebang script names to Language names
+#
+# Language names are implicitly mapped to their downcased versions,
+# so this would be redundant:
+#
+#   Ruby:
+#   - ruby
+
+Java:
+- groovy
+
+# JavaScript interpreters
+JavaScript:
+- node
+
+# Ruby interpreters and runners
+Ruby:
+- macruby
+- rake
+
+# Other shells
+Shell:
+- bash
+- sh
+- zsh