scripts: demosite populate options

* Custom MARC file input for demo records;
* Starting bibsched job id;
* Extra info.

Signed-off-by: Adrian-Tudor Panescu <adrian.tudor.panescu@cern.ch>
travis-ci: pip issue hotfix

Signed-off-by: Adrian-Tudor Panescu <adrian.tudor.panescu@cern.ch>
Merge pull request #2 from adrianp/poo

scripts: demosite populate options