PSR4 and update READMEs with small typos

                   
|Q            |A  |
|---          |---|
|Bug Fix?     |no |
|New Feature? |no |
|BC Breaks?   |no |
|Deprecations?|no |
|Tests Pass?  |no |
|Fixed Tickets|   |
|License      |MIT|
                   


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in the same way, you should probably separate the file structure changes (you haven't just switch to using the PSR-4 autoloader config for Composer, you remove a folder level, thus moving everything) which may require some discussion in the team from the typo fixes in the readme and comments (which can be merged easily as this is a no-brainer)