* added biome samples filter to check biome proportions (#173, #266)
* added outline display for the area of selected conditions (WIP)
* added "from-visible" to conditions editor (#271)
* added Locations to Search tab, to look for positions in the current seed
* moved Tiggers to Search tab
* changed area/position input fields to use block coordinates (#265)
* changed spiral iterator to use an arbitrary, user defined step size
* fixed octave options and added generated display texts (#253)