- Changed default admin association from string "Admin" into checking if user actually is administrator

- Replaced .kjb to use a copy step instead of a unzip. Should fix the random fail issue
Conflicts:
	src/org/pentaho/marketplace/Plugin.java
BISERVER-7760 fix
Timestamped downloaded file names to avoid collisions
Merge pull request #22 from webdetails/1.0

fixes for download issues