Fixes logged "deprecated"-warnings in RC1

Statamic 1.5RC1 throws the warning Use of $this->parse_loop() is deprecated. Use Parse::tagLoop() instead. and Use of $this->fetch_param() is deprecated. Use $this->fetchParam() instead. Replaced both as instructed. Works and no warnings
Merge pull request #14 from lekkerding/master

Statamic 1.5RC1 deprecated functions warning in log.