updated install script to fetch wildcard tag names
checking if the tag/branch exists before downloading
Merge pull request #6 from paypal/installscript103-php5.3

updated install script to fetch wildcard tag names
updated stubs, version and changelog for 103 release
echoing paykey if set
removing references to sdk core files
removing logger as it is no longer exposed as external class
Merge pull request #9 from paypal/rel-3.5.103

Rel 3.5.103