init: 0.14.0 version bump

Refactorized root FS related bits into a cleaner dorootfs() function;
now file system should be the 2nd field and FS checking the 3rd.
modules/3d-zfs: 0.14.0 version bump: iroot parsing update
README.textile: 0.14.0 version bump

Introduced file system position change for *iroot* kernel cmdline
argument.