Fix many typos.

primarly -> primarily
Enerygy -> Energy
automimmune -> autoimmune
theatre -> theater
fulfilment -> fulfillment
progam -> program
toystore -> toy store
pawnstore -> pawn store
existance -> existence
organiser -> organizer
organisation -> organization
spacedelimited -> space delimited
Ethopian -> Ethiopian
Add note about spelling
Merge pull request #22 from scor/typo-fixes1

Fix many typos.