Add support for eye tracking frequency, and participants query

[HamAndChris]

Hello, I have added the following functions to my controller.py which enables changing the default eye tracking frequency:

	def get_et_freq(self):
		return self.get_configuration()['sys_et_freq']

	def get_et_frequencies(self):
		return self.get_status()['sys_et']['frequencies']

	def set_et_freq_50(self):
		data = {'sys_et_freq': 50}
		json_data = self.__post_request__('/api/system/conf', data)

	def set_et_freq_100(self):
		"""May not be available. Check get_et_frequencies() first."""
		data = {'sys_et_freq': 100}
		json_data = self.__post_request__('/api/system/conf', data)

Also, this allows querying the list of participants and projects directly:

	def get_projects(self):
		return self.__get_request__('/api/projects')

	def get_participants(self):
		return self.__get_request__('/api/participants')

I would just make a pull request but I'm too lazy.

Thanks,

• Chris

[ddetommaso]

Hi @HamAndChris,

thank you for your code enhancements. I just included in the last commit 1b95aa8 which has also an alphabetically reorder of all the methods.

[HamAndChris]

One more for you:

	def get_recordings(self):
		return self.__get_request__('/api/recordings')

Thanks,

• Chris