Enhancements

Fix a bug that Clash may interpret pure number password as float64 type (Issue [#58](https://github.com/tindy2013/subconverter/issues/58)).
Fix support for parsing some non-standard Clash configurations.
Add generator-only mode to save configurations to files or upload to Gists.
Optimize codes.
Fix typo.

base/config/example_external_config.ini

@@ -52,6 +52,6 @@ clash_rule_base=base/forcerule.yml
 ;emoji=(流量|时间|应急),🏳️‍🌈
 ;emoji=阿根廷,🇦🇷
 
-;Optims for filtering nodes
+;Options for filtering nodes
 ;include_remarks=
 ;exclude_remarks=