Experiment-server

Added
- Allow setting random seed in toml config
- Function calls within configs

Removed
- Removed `base_config.expconfig` in static folder and references to it.

Added
- Generate json files based on config file from cli
- Get complete config (in server, client and experiment)
- Watchdog to reload config when it's modified

Changed
- Fix - Allow flat list for order
- Fix - Inconsistent naming
- Refactor - rename `_main` to `_server`
- Refactor - moved `GlobalState` to `_api`

Added
- `Experiment` class to allow loading and managing script locally.
- toml based configurations.
- `-i/--participant-index` as cli option for `run`

Changed
- Renaming `step` to `block` and `step_name` to `name`
- Refactor: `GlobalState`'s camel case to snake case
- Fixed same condition being reused causing issues with `resolve_extends` as the reused dicts are references.

Added
- Change log
- Adding functions to process `extends`.
- `Utils.merge_dicts`
- `_process_config.resolve_extends`
- `_process_config._resolve_extends`
- Adding test cases to cli
- Adding `change_participant_index` to api
- Adding `globalData` to api

Changed
- ExperimentConfig was refactored into ExperimentRouter
- Fixed issues in stati html page:
- Call to `/move`: post->get
- Adding button to get and display config
- Updaing sample_config to reflect uptodate changes.
- Renaming `participant_id` to `participant_index`
- Replace flask with tornado

- Started tracking