Make whitespace match PSR/2 standard (3.2.0 update)

[ejegg]

This is the recommended standard for PHP libraries

Also inserts missing braces around one-line conditionals and standardizes case of booleans.

[ejegg]

@bjguillot , to review this you might want to use the '-w' switch to 'git diff' or 'git log'

That switch will ignore all the changes where whitespace is just inserted or deleted within a single line, and show all the place where braces have been moved to different lines, etc.

[ejegg]

Fixes #34

[bjguillot]

Thanks for the suggestion on the '-w' switch.