* improve db error handling
* web view should always result in an user friendly error if the db connection is missing or erronous
* cli use should never fatal if the db connection is erronous. How are you going to fix it, d'uh.
* if some CLISetup script requires a db connection check it individually
* toggle maintenance mode in a more reasonable manner (i.e. not when displaying help test)
* move connectivity tests to class DB
* restore generate everything functionality when running --sql and --build with an empty parameter set
* automatically set and unset maintenance mode when data is being edited (either sql or files)
* added more verbose help prompts. They should now always appear when -h is used.
* added --setup as more intuitive command for --firstrun. --firstrun is now considered deprecated and will be removed in due time.
* unfuck order of indizes in --siteconfig
* fixed some typos
* convert echo use to CLI::write
* move scattered command line argument checks to CLISetup
