Docs clean up part 1

Big push on getting the docs cleaned up before 1.0. Proper wrapping of
everything so it's decently viewable from the command line (or as
decently viewable as markdown can be - the tables will never look great
from the command line).

Only one code change in this PR: rename bouncetime to bounce_time
(everything else is PEP-8, so this probably should be too) and change
its units to seconds from milliseconds (again, all other durations in
the library are in seconds, so it feels inconsistent that this one
isn't; for the sake of those who won't read the docs - which is most
people - I figure consistency helps with guessing!).

docs/outputs.md

@@ -1,10 +1,12 @@
 # Output Devices
 
-These output device component interfaces have been provided for simple use of everyday components.
+These output device component interfaces have been provided for simple use of
+everyday components.
 
 Components must be wired up correctly before used in code.
 
-*Note all GPIO pin numbers use BCM numbering. See the [notes](notes.md) page for more information.*
+*Note all GPIO pin numbers use BCM numbering. See the [notes](notes.md) page
+for more information.*
 
 ## LED