Consider reworking clients to be higher level

[derekjn]

(This applies to all clients)

Currently they're all just thin wrappers around GET, PUT, POST, etc, which is a good foundation that gives users a lot of flexibility. But we should build on what we already have by adding calls that abstract away HTTP completely:

stride.create_process('process0', 'SELECT x, count(*) FROM s GROUP BY x')
{
  'name': 'process0',
  'query': 'SELECT x, count(*) FROM s GROUP BY x',
  'action': 'MATERIALIZE',
  'args': {}
}

stride.collect('s', [{'x': 0}, {'x': 1}, ...])

stride.analyze('SELECT * FROM process0')
[(0, 10), (1, 20), ...]

stride.save_analyze('analyze_name', 'SELECT * FROM process0')
{
  'name': 'analyze_name',
  'query': 'SELECT * FROM process0'
}

etc...