Upgraded to CI 2.2.2, did some cleaning.
Merge remote-tracking branch 'origin/dev' into dev

Conflicts:
	.gitignore
	.htaccess
	application/config/autoload.php
	application/config/config.php
	application/config/constants.php
	application/config/database.php
	application/config/email.php
	application/config/ion_auth.php
	application/config/mimes.php
	application/config/routes.php
	application/config/smileys.php
	application/config/user_agents.php
	application/controllers/auth.php
	application/controllers/repairs.php
	application/errors/error_php.php
	application/language/english/auth_lang.php
	application/libraries/Ion_auth.php
	application/libraries/MY_Pagination.php
	application/libraries/breadcrumb.php
	changelog.md
	index.php
	license.md
	readme.md
	system/core/Benchmark.php
	system/core/CodeIgniter.php
	system/core/Common.php
	system/core/Config.php
	system/core/Controller.php
	system/core/Exceptions.php
	system/core/Hooks.php
	system/core/Input.php
	system/core/Lang.php
	system/core/Loader.php
	system/core/Model.php
	system/core/Output.php
	system/core/Router.php
	system/core/Security.php
	system/core/URI.php
	system/core/Utf8.php
	system/database/DB.php
	system/database/DB_active_rec.php
	system/database/DB_cache.php
	system/database/DB_driver.php
	system/database/DB_forge.php
	system/database/DB_result.php
	system/database/DB_utility.php
	system/database/drivers/cubrid/cubrid_driver.php
	system/database/drivers/cubrid/cubrid_forge.php
	system/database/drivers/cubrid/cubrid_result.php
	system/database/drivers/cubrid/cubrid_utility.php
	system/database/drivers/mssql/mssql_driver.php
	system/database/drivers/mssql/mssql_forge.php
	system/database/drivers/mssql/mssql_result.php
	system/database/drivers/mssql/mssql_utility.php
	system/database/drivers/mysql/mysql_driver.php
	system/database/drivers/mysql/mysql_forge.php
	system/database/drivers/mysql/mysql_result.php
	system/database/drivers/mysql/mysql_utility.php
	system/database/drivers/mysqli/mysqli_driver.php
	system/database/drivers/mysqli/mysqli_forge.php
	system/database/drivers/mysqli/mysqli_result.php
	system/database/drivers/mysqli/mysqli_utility.php
	system/database/drivers/oci8/oci8_driver.php
	system/database/drivers/oci8/oci8_forge.php
	system/database/drivers/oci8/oci8_result.php
	system/database/drivers/oci8/oci8_utility.php
	system/database/drivers/odbc/odbc_driver.php
	system/database/drivers/odbc/odbc_forge.php
	system/database/drivers/odbc/odbc_result.php
	system/database/drivers/odbc/odbc_utility.php
	system/database/drivers/pdo/pdo_driver.php
	system/database/drivers/pdo/pdo_forge.php
	system/database/drivers/pdo/pdo_result.php
	system/database/drivers/pdo/pdo_utility.php
	system/database/drivers/postgre/postgre_driver.php
	system/database/drivers/postgre/postgre_forge.php
	system/database/drivers/postgre/postgre_result.php
	system/database/drivers/postgre/postgre_utility.php
	system/database/drivers/sqlite/sqlite_driver.php
	system/database/drivers/sqlite/sqlite_forge.php
	system/database/drivers/sqlite/sqlite_result.php
	system/database/drivers/sqlite/sqlite_utility.php
	system/database/drivers/sqlsrv/sqlsrv_driver.php
	system/database/drivers/sqlsrv/sqlsrv_forge.php
	system/database/drivers/sqlsrv/sqlsrv_result.php
	system/database/drivers/sqlsrv/sqlsrv_utility.php
	system/helpers/array_helper.php
	system/helpers/captcha_helper.php
	system/helpers/cookie_helper.php
	system/helpers/date_helper.php
	system/helpers/directory_helper.php
	system/helpers/download_helper.php
	system/helpers/email_helper.php
	system/helpers/file_helper.php
	system/helpers/form_helper.php
	system/helpers/html_helper.php
	system/helpers/language_helper.php
	system/helpers/number_helper.php
	system/helpers/path_helper.php
	system/helpers/security_helper.php
	system/helpers/smiley_helper.php
	system/helpers/string_helper.php
	system/helpers/text_helper.php
	system/helpers/typography_helper.php
	system/helpers/url_helper.php
	system/helpers/xml_helper.php
	system/language/english/calendar_lang.php
	system/language/english/date_lang.php
	system/language/english/email_lang.php
	system/language/english/form_validation_lang.php
	system/language/english/ftp_lang.php
	system/language/english/imglib_lang.php
	system/language/english/migration_lang.php
	system/language/english/unit_test_lang.php
	system/language/english/upload_lang.php
	system/libraries/Cache/Cache.php
	system/libraries/Cache/drivers/Cache_apc.php
	system/libraries/Cache/drivers/Cache_dummy.php
	system/libraries/Cache/drivers/Cache_file.php
	system/libraries/Cache/drivers/Cache_memcached.php
	system/libraries/Calendar.php
	system/libraries/Cart.php
	system/libraries/Driver.php
	system/libraries/Email.php
	system/libraries/Encrypt.php
	system/libraries/Form_validation.php
	system/libraries/Ftp.php
	system/libraries/Image_lib.php
	system/libraries/Javascript.php
	system/libraries/Log.php
	system/libraries/Migration.php
	system/libraries/Pagination.php
	system/libraries/Parser.php
	system/libraries/Profiler.php
	system/libraries/Session.php
	system/libraries/Sha1.php
	system/libraries/Table.php
	system/libraries/Trackback.php
	system/libraries/Typography.php
	system/libraries/Unit_test.php
	system/libraries/Upload.php
	system/libraries/User_agent.php
	system/libraries/Xmlrpc.php
	system/libraries/Xmlrpcs.php
	system/libraries/Zip.php