Add changelog for #2576, and remove console.log

changelog.md

 # Next
 # Next
 - [INTERNALS] Update `inflection` dependency to v1.5.3
 - [INTERNALS] Update `inflection` dependency to v1.5.3
+- [FEATURE] Replaced string error messages for connection errors with error objects. [#2576](https://github.com/sequelize/sequelize/pull/2576)
+
+#### Backwards compatability changes
+- Some of the string error messages for connection errors have been replaced with actual error instances. Checking for connection errors should now be more consistent.
 
 
 # 2.0.0-rc3
 # 2.0.0-rc3
 - [FEATURE] Added the possibility of removing multiple associations in 1 call [#2338](https://github.com/sequelize/sequelize/issues/2338)
 - [FEATURE] Added the possibility of removing multiple associations in 1 call [#2338](https://github.com/sequelize/sequelize/issues/2338)

lib/dialects/sqlite/connection-manager.js

@@ -30,7 +30,6 @@ ConnectionManager.prototype.getConnection = function(options) {
   return new Promise(function (resolve, reject) {
   return new Promise(function (resolve, reject) {
     self.connections[options.uuid] = new self.lib.Database(self.sequelize.options.storage || self.sequelize.options.host || ':memory:', function(err) {
     self.connections[options.uuid] = new self.lib.Database(self.sequelize.options.storage || self.sequelize.options.host || ':memory:', function(err) {
       if (err) {
       if (err) {
-        console.log(err);
         if (err.code === 'SQLITE_CANTOPEN') return reject(new sequelizeErrors.ConnectionError(err));
         if (err.code === 'SQLITE_CANTOPEN') return reject(new sequelizeErrors.ConnectionError(err));
         return reject(new sequelizeErrors.ConnectionError(err));
         return reject(new sequelizeErrors.ConnectionError(err));
       }
       }