adding if statement around port declaration, and returning query-generator to original form

lib/dialects/postgres/connector-manager.js

@@ -44,7 +44,7 @@ module.exports = (function() {
     this.isConnecting = true
     this.isConnected  = false
 
-    var conStr = '<%= protocol %>://<%= user %>:<%= password %>@<%= host %>/<%= database %>'
+    var conStr = '<%= protocol %>://<%= user %>:<%= password %>@<%= host %><% if(port) { %>:<%= port %><% } %>/<%= database %>';
     conStr = Utils._.template(conStr)({
       user: this.config.username,
       password: this.config.password,

lib/dialects/postgres/query-generator.js

@@ -61,7 +61,7 @@ module.exports = (function() {
       primaryKeys[tableName] = []
       tables[tableName] = {}
 
-      var query   = "CREATE TABLE <%= table %> (<%= attributes%>)"
+      var query   = "CREATE TABLE IF NOT EXISTS <%= table %> (<%= attributes%>)"
         , attrStr = Utils._.map(attributes, function(dataType, attr) {
             dataType = pgDataTypeMapping(tableName, attr, dataType)
             return addQuotes(attr) + " " + dataType