Update README.md

Merge pull request PHPExif#44 from bonzai/master

Allowed for duplicated tags in the raw data

Merge pull request PHPExif#34 from Miljar/rel/v0.4.0

Rel/v0.4.0

0.3.0 release

0.3.0 release

Merge pull request PHPExif#11 from Miljar/v0.2.1

V0.2.1

Merge branch 'master' of git://github.com/Miljar/php-exif

Updated travis config

erge remote-tracking branch 'origin/master'

Merge pull request PHPExif#4 from Miljar/issues/3

Issues/3