add pass value update methods
Merge pull request #1 from kevin39/master

Add requirement check for FILEINFO PHP extension
Merge pull request #2 from kevin39/master

Restcall fix for DELETE
Merge branch 'master' of https://github.com/passslot/passslot-php-sdk
bump version to 0.3
Added support for all PASSES methods

All PassSlot's PASSES methods are now supported.

* listPass
* getPass
* pushPass
* deletePass