Add harvester cronjob

updated epel rpm version, added cronie as dependency and
a restart of the cron service in the rpm to make sure it's
running
add paster post-install-dbinit command

  - fix 'create index on' statements to have a name.
  - add command to load what_to_alter.sql and constraints.sql
Merge branch 'master' of github.com:okfn/ckanext-geodatagov
start arcgis work
add arcgis file
collection filtering, tag splitting and organization_type added
Remove path from ckan_extends in templates
Add links to different sourcxe metadata files

Adds links on the dataset page to the relevant harvest object contents,
both raw and formatted as html. The HTML view does not work because the
provided XSLT does not support neither ISO nor FGDC documents.

If the original data was in FGDC, an additional set of links are
displayed pointing to it.
Add missing helpers file
Merge branch 'master' into move-harvesters-to-spatial

Conflicts:
	ckanext/geodatagov/harvesters/__init__.py
Minor fixes to ArcGIS harvester for new base harvester