add human rig defaults

[leoscholl]

WIP

[leoscholl]

• added human rig settings to rig_defaults.py
• updated np.float to float everywhere
• added a test_graphics.py fixture to test displaying new graphics
• created a TextTarget graphic to display written text on the screen
• added a RewardScore feature to display a score at each reward

[leoscholl]

also added sync_every_cycle=True to SyncHDF -- this increases the accuracy of the bmi3d clock for games running without the ecube or other sync

[leoscholl]

ready for review!

[katherineperks]

You should make sure the other tasks still work in the booth with these changes!

[leoscholl]

updated the docs, saved the score to the HDF file, and tested on rig1 that everything still works!