Reorder documentation
Reorder documentation

* Move more common formatters first
* make it obvious that `realTest` outputs real text
* reduce the image formatters doc (the readme doesn't replace the phpDoc)

cjaoude/Faker,lasselehtinen/Faker,zeropool/Faker,selmonal/Faker,davidyell/Faker,ravage84/Faker,ivyhjk/Faker,shunsuke-takahashi/Faker,jadb/Faker,stof/Faker,jeffaustin81/Faker,igorsantos07/Faker,oshancsedu/Faker,CodeYellowBV/Faker,guillaumewf3/Faker,alexlondon07/Faker,d3trax/Faker,bmitch/Faker,nikmauro/Faker,Beanhunter/Faker,vlakoff/Faker,kkiernan/Faker,matriphe/Faker,mseshachalam/Faker,oswaldderiemaecker/Faker,huang53798584/Faker,duchaiweb/Faker-1,chrismoulton/Faker,splp/Faker,drakakisgeo/Faker,datagit/Faker,pathirana/Faker,antonsofyan/Faker,luisbrito/Faker,syj610226/Faker,cenxun/Faker,mousavian/Faker,xfxf/Faker-PHP,simonfork/Faker,BePsvPT/Faker,dongnhut/Faker,brainrepo/Faker,xfxf/Faker,kevinrodbe/Faker,kuldipem/Faker,Balamir/Faker,nalekberov/Faker,muya/Faker,localheinz/Faker