Assets 3
1. support all v2ray outbound protocols via providing a valid json
2. support import from JSON file (v2ray/ss) and ss://,ssd://,http(s):// links
3. support v2ray's routing
4. remove rule mode, keep only pac/global/manual modes
5. support v2ray's load balancer
6. support subscription and auto update

feature freeze for v1.5.0

This version contains massive code refactorings and the config file is
not compatibal with previous versions. BACKUP ALL YOUR SERVER
INFOMATIONS before you try this version.