Javadoc and Formatting fixes.
Also, extremely minor code changes which have been tested.
This commit is only part one of two commits that aim to fix problems with formatting in our project. In part two I will modify the Google Java Style Guide (since it closely matches our code style) for our project so there is guidance on how to format and document.
* Updated PlotSquared URL
* Removed plugin acronyms
* Fixed a typo
* Fixed grammar
* Use modern block id's
* Update YouTube video URL
/br sspl - says to click same spot again to apply, clicked same spot and nothing happens
/br layer - gives an error message "there was an error handling a FAWE command: [See console]
/br clipboard - doesn't let me execute because of max radius of 5, however am unable to set a lower radius as there is no option for it
/br butcher - tried to kill some mobs, but didn't work (nothing happened)
/br splatter - tried to execute the command, nothing happened
