InviZible Pro beta 0.7.5

* Updated DNSCrypt to version 2.0.42.

* Updated DNSCrypt configuration file.

* Updated snowflake binary.

* Fixed checking InviZible update manually.

* Implemented snowflake bridge log.

* Implemented option for using different STUN servers with the snowflake bridge.

* Implemented the use of Tor http proxy to request new bridges.