[refs #72] Refactoring the homepage wordpress code to include the various tweaks required to separate data (eg uploads) from akvo code and from wordpress code
[fixes #103] Using the -a and -k switches to fabric to force using a password rather than trying to use keys in ssh-agent
[refs #72] Gratuitious amounts of jiggerypokery to coerce Wordpress into working. The process running WordPress needs to have the same uid as the files it creates (see http://wordpress.stackexchange.com/a/108990), so the best solution is to create an FPM pool per PHP app (which is actually more secure in any case)
[refs #72] Updating the AkvoSites provisioning to use the new PHP pools
[refs #72] Adding deploy keys for the homepage user so the make_version script can be run on teamcity
Merge branch 'feature/72-homepage-deployments'