Update README.md

--area argument should be quoted
Merge pull request #4 from clkao/patch-1

Update README.md
merge fix
Merge pull request #5 from jazzido/spacingfix

insert spaces for TextElement distances slightly less than width_of_space
updating pdfbox as per https://github.com/jazzido/tabula/issues/80
Merge remote-tracking branch 'origin/master' into ffi_lsd