Move Python init to top of autoloading; finish in case of error
Move Python init to top of autoloading; finish in case of error

This will not define jedi-vim's functions in case initialization failed.

FBruynbroeck/jedi-vim,maxamillion/jedi-vim,pze/jedi-vim,aliev/jedi-vim,wilywampa/jedi-vim,jmartiuk5/jedi-vim,clavery/jedi-vim,davidhalter/jedi-vim,itchyny/jedi-vim,genzj/jedi-vim