initial patch by CasperVector
Merge branch 'master' (early part) into 68-lwd
Merge branch 'master' (early part) into 68-lwd
Merge branch 'master' into 68-lwd

Conflicts:
	R/tikz.R
	src/tikzDevice.c
	src/tikzDevice.h
Indent with two spaces
configure line width
Merge branch '68-lwd-squash' into 68-lwd
default remains at 0.4
Merge branch 'master' into 68-lwd
copy test
attempt to reduce merge conflict
Merge branch 'master' into 68-lwd

Conflicts:
	src/tikzDevice.c
add new option tikzLwdUnit
execute test with different lwdUnit setting
document option in vignette
Merge branch 'master' into 68-lwd
document
NEWS
Merge branch 'master' into 68-lwd

Conflicts:
	vignettes/tikzDevice.Rnw
Merge pull request #71 from yihui/68-lwd

Modifying line width