Merge pull request #31 from Dziolas/master

BibCheck: new bibcheck plugin for fixing Springer affiliations.
compliance-check: Adds correct search delimiter

* Adds the currently used regex_search_delimiter (//) to
  compliance_check.py

* Now raises an exception in RawTextSearch in the case of a wrong
  search delimiter that would otherwise lead to an infinite loop.

Signed-off-by: Martin Vesper <martin.vesper@cern.ch>
BibTasklets: add Harvesting-Kit tasklets

Signed-off-by: Jan Aage Lavik <jan.age.lavik@cern.ch>
Merge pull request #32 from mvesper/rawtext_search_delimiter_fix

compliance-check: Adds correct search delimiter
Merge pull request #33 from jalavik/bibtasklets-from-harvestingkit

BibTasklets: add Harvesting-Kit tasklets
Merge pull request #34 from Dziolas/master

Compliance: fixes typo in compliance.py
Nations: improves nation extraction script
Merge pull request #35 from Dziolas/fix-nations

Nations: improves nation extraction script
Makefile: adds installation of Elsevier, Oxford, Springer tasklets.