convert the array syntax to php 5.3

As discussed in person w/@mrtazz, this change should make the
code backwards compatible with php 5.3.
add requirements in README
add tags feature

this was ignored by the ctags ignore in my .gitignore before, sorry about that
Convert syntax to PHP 5.3
add deleted column back to tags table
add basic travis.yml
it's php
add travis-ci status to README
Add a note on using PHP built-in server

If someone wants to quickly preview what Morgue does without having to configure apache the built-in web server does the job.
follow location (was breakin on JIRA redirects)
updating readme on syncing additional schemas
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
adding tests for new contact lib functions
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.
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
prevent default action when clicking delete postmortem (so the page does not reload)
adding screenshots to readme
Allow severity levels to be configured