Merge pull request adafruit#32 from tekktrik/hotfix/fix-patch

Pylint and RTD update patch, and other fixes

Merge pull request adafruit#29 from FoamyGuy/grid_example_cell_padding

lower cell_padding in the grid example

Merge pull request adafruit#28 from Neradoc/patch-1

Fix setting a pixels slice

Merge pull request adafruit#27 from kattni/speaker-enable

Update SPEAKER_ENABLE pin name.

Merge pull request adafruit#26 from kattni/remove-errant-line

Remove errant line from example.

Merge pull request adafruit#25 from kattni/mp3-playback

Add MP3 playback and example with files.

Merge pull request adafruit#16 from apendley/extended_tone_demo

Add extended tone demo to examples

Merge pull request adafruit#22 from dhalbert/keyboard-layout-fix

fix on-demand creation of .keyboard_layout

Merge pull request adafruit#19 from kattni/indent

Fix indent.

Merge pull request adafruit#15 from kattni/rotation

Adding rotation demo.