updated CHANGELOG, prepare 3.0.1 release
updated CHANGELOG, prepare 3.0.1 release

silexphp/Pimple,mnapoli/simplex,jpauli/Pimple,jpauli/Pimple,michabbb-backup/Pimple,arduanov/Pimple,gomboc/Pimple,jpauli/Pimple,gomboc/Pimple,arduanov/Pimple