rename the morgue schema file to postmortems

Renaming this file to reflect the tables that are created is more
in line with the other schema files, as well as allows for using
the filename to determine if the schema should be executed or not.
update documentation for schema filename change
Merge pull request #17 from nkammah/master

Adding follow redirect option to curl client and updating README
Update the README with a link to the talk video
Make the user lookup URL configurable

This commit addresses the hardcoded URL to lookup a user on a 3rd party site. Simply
define a lookup_url in the contact section of the config, using a %s where the username
should be substituted, eg. http://foo.com/bar/%s
Make the JIRA fields to display configurable

This change allows anyone to define a list of additional fields to display in Morgue - by default, the only reported fields are
 - key
 - summary
 - status
 - assignee
 - link

Additionally, the querying mechansim has been changed to query all the issues related to a post mortem at once (using a JQL query), instead of querying issues one by one.
adding tests for new contact lib functions
Merge pull request #20 from nkammah/configurable_contact_url

Make the user lookup URL configurable
Merge pull request #21 from nkammah/jira_fields_refactoring

Make the JIRA fields to display configurable
Merge pull request #9 from miketheman/rename_schema_file

rename the morgue schema file to postmortems
prevent default action when clicking delete postmortem (so the page does not reload)
adding screenshots to readme