Merge pull request #19 from oxford-physics/master

Added defrag and healthcheck
fix ":" -> "="
synchronising defrag example with used template
add partitionable_slots parameter
only  overcommiting memory for partitionable slots
adding option for DEV repositories
Merge pull request #22 from kreczko/small-fix

fix ":" -> "="
Merge pull request #23 from kreczko/defrag-part-slots

Defrag and partitionable slots
Merge pull request #24 from kreczko/install-dev-repo

adding option for DEV repositories
added "request_memory" parameter to switch on/off the memory requirement
only specify request_memory if enabled, otherwise set to 0
Merge pull request #25 from kreczko/request-memory

Request memory
added "email_domain", "default_domain_name" and "filesystem_domain" parameters
added "DEFAULT_DOMAIN_NAME" and "FILESYSTEM_DOMAIN" parameters
changed "localhost" to the email_domain parameters for "EMAIL_DOMAIN"
Merge pull request #26 from kreczko/domain

email, default and filesystem domains
added the following parameters: priority_halflife, default_prio_factor, group_accept_surplus, group_autoregroup
replacing defaults with parameters for PRIORITY_HALFLIFE, GROUP_ACCEPT_SURPLUS, GROUP_AUTOREGROUP, DEFAULT_PRIO_FACTOR
added parameters queues, periodic_expr_interval, max_periodic_expr_interval, remove_held_jobs_after, leave_job_in_queue
added LeaveJobInQueue parameter and queue template