cylc.rundb: replace state dump

New table for:
* Suite parameters, e.g. run mode, initial/final cycle points.
* Current tasks in task pool, with their "spawned" status.
Restart loads previous states from run DB.
Remove duplicated columns from task_states and task_events tables.
Remove state dump functionality.

bin/cylc

@@ -197,7 +197,6 @@ information_commands['gpanel'] = ['gpanel']
 information_commands['gui'] = ['gui', 'gcylc']
 information_commands['list'] = ['list', 'ls']
 information_commands['dump'] = ['dump']
-information_commands['cat-state'] = ['cat-state']
 information_commands['show'] = ['show']
 information_commands['cat-log'] = ['cat-log', 'log']
 information_commands['get-suite-version'] = [
@@ -414,7 +413,6 @@ comsum['diff'] = 'Compare two suite definitions and print differences'
 # information
 comsum['list'] = 'List suite tasks and family namespaces'
 comsum['dump'] = 'Print the state of tasks in a running suite'
-comsum['cat-state'] = 'Print the state of tasks from the state dump'
 comsum['show'] = 'Print task state (prerequisites and outputs etc.)'
 comsum['cat-log'] = 'Print various suite and task log files'
 comsum['documentation'] = 'Display cylc documentation (User Guide etc.)'