PubSub system (#346)

* Add websocketpp dependency

* Initial pubsub commit

Renamed selection min and max variables to selectionMin and selectionMax
to bypass windows min/max macros being stupid.

TwitchAccount is now initialized with its User ID. It cannot be changed
after it has been initialized.

* Update openssl folder

* Update installation instructions

* Split up websocketpp dependency to its own code only and openssl.pri

* Add missing include to asio steady_timer

* Update dependencies for linux

src/providers/twitch/twitchaccount.cpp

@@ -6,10 +6,11 @@ namespace providers {
 namespace twitch {
 
 TwitchAccount::TwitchAccount(const QString &_username, const QString &_oauthToken,
-                             const QString &_oauthClient)
+                             const QString &_oauthClient, const QString &_userID)
     : oauthClient(_oauthClient)
     , oauthToken(_oauthToken)
     , userName(_username)
+    , userId(_userID)
     , _isAnon(_username == ANONYMOUS_USERNAME)
 {
 }
@@ -34,11 +35,6 @@ const QString &TwitchAccount::getUserId() const
     return this->userId;
 }
 
-void TwitchAccount::setUserId(const QString &id)
-{
-    this->userId = id;
-}
-
 bool TwitchAccount::setOAuthClient(const QString &newClientID)
 {
     if (this->oauthClient.compare(newClientID) == 0) {