adding default_actions and dotfile src/dst paths to template these (for #125)

dotdrop/dotfile.py

@@ -40,6 +40,13 @@ class Dotfile:
         self.noempty = noempty
         self.upignore = upignore
 
+    def get_vars(self):
+        """return this dotfile templating vars"""
+        _vars = {}
+        _vars['_dotfile_src'] = self.src
+        _vars['_dotfile_dst'] = self.dst
+        return _vars
+
     def __str__(self):
         msg = 'key:\"{}\", src:\"{}\", dst:\"{}\", link:\"{}\"'
         return msg.format(self.key, self.src, self.dst, self.link.name.lower())