updated website

[surratta]

I've just finished overhauling the website to use a new version of bootstrap (a web ui framework). shouldn't be any changes, but please let me know if you find anything out of whack. I'll address stuff as it comes to my attention.

[surratta]

I've also updated the version of php that we're using. this should only affect phpbb. if you see any problems with phpbb, please let me know.