beginnings of vignette on masks
vignette lines
emacs files
really emacs files
first stab at new chain.bin, no tests yet
ignore emacs *# files
Merge branch 'master' of https://github.com/SWotherspoon/SGAT
minor comments
chain.bin now accepts the fit object, and deals with one of pimg, grid
or proj to build up the grid

tidied up methods documentation for cut, print, and [.Pimage

new print method for Pimage

new internal function .check_rgdal
comments updated
Merge branch 'master' into Pimage01

Conflicts:
	R/Pimage.R
tiday