WebSubmit: file stamper option to copy metadata

* Introduces the "--skip-metadata" option to the file stamper.
  If enabled, the file stamper will not copy the PDF metadata from the input
  file to the (stamped) output file. Otherwise, the file stamper will attempt
  to copy all PDF metadata.  (closes #1569)

Signed-off-by: Nikolaos Kasioumis <nikolaos.kasioumis@cern.ch>
Acked-by: Tibor Simko <tibor.simko@cern.ch>
WebSession: Python-2.4 combatibility issue fix

* In Python-2.4 tuples don't have the index attribute. Converting a tuple to a
  list will provide that attribute.

Signed-off-by: Nikolaos Kasioumis <nikolaos.kasioumis@cern.ch>
Reviewed-by: Tibor Simko <tibor.simko@cern.ch>
installation: README.rst with build status badges

* Adds new documentation file README.rst which is essentially
  identical to README, plus contains extra links to Travis build
  status badges, bringing them onto the GitHub home page.

  This is done because apparently GitHub only recognises file
  formats by extensions, so badges cannot be easily introduced
  into plain README files (that we still keep as per GNU autotools
  practices).

Signed-off-by: Tibor Simko <tibor.simko@cern.ch>
installation: GnuPG key server location update

* Updates location from where to get the GnuPG keys; the old
  location was not working anymore since quite a while.

Signed-off-by: Tibor Simko <tibor.simko@cern.ch>
BibRecord: new MARC code filter

* Filters a record based on MARC code

* Supports wildcards in identifiers and subfield code

Signed-off-by: Patrick Glauner <patrick.oliver.glauner@cern.ch>