Increases/decreases wpm on the fly

Adds keybindings `f' and `s' for faster/slower wpm rate.
Make font non-italicized by default
Merge remote-tracking branch 'oscarfv/faster-slower'
Fix bug changing speed when paused. Minor refactor.
add spray-quit plus some minor docs
Enable and enhance left and top margins
remove exit on all keys. things like ctrl-h m are usefull
update doc, no idea what orp means so rename it
updated docs
small doc update
minor doc update
small doc update
fix typo
fix accidental key deletion and rename orp to accent
fix smartparen integration bug
fix highlight-symbol integration
add comments and a known bug on repeated words
improve documentation
add left margin of 1 by default
minor doc update