Update README.md

[bish0polis]

nits:

• compound verbs like 'back up' or 'shut down' or 'set up' need that space in-between.
• 'better' is qualitative, while 'more' is quantitative and needs more verbiage there.
• 'any time' needs the space in this usage.
• adjectives like 'above' need a noun to modify (and prepositions need to follow that noun; not precede it)