Update README.md

3 spelling changes made. Had to do it with the GUI ;_; but it registered it, i also had to create my own separation from the master branch, in order to *get* the edit button available to edit it. Then when saved, it updated (to the master branch?) and i had something to Compare. The compare screen has the pull request button in it since the two (my fork, and your upstream master) are different...

I am guessing i either did something incomplete in pushing my edited local clone of your project, or it doesnt push the README.md and LICENSE files as they're some kind of default? 

first steps are so awkward