add support for custom url builder. auto-detect when hosted under Dis…

…cord. colyseus/colyseus#707

bump 0.15.24. #143

Cocos Creator: avoid setting .withCredentials on Native platform

throw the original underlining error instead of 'offline'

throw the original underlining error instead of 'offline'

always include credentials. bump version

allow Client endpoint with relative URL. bump version

workaround for 'Access is denied' for localStorage. #139

bump 0.15.17

auth.sendResetPassword() should not trigger auth change. bump version.