no build vignette option
Revert "Merge branch 'dev' into vignette"

This reverts commit 1226087e5817e3d867f537d834259a24d971659a, reversing
changes made to e5b4cc6ec587eb97e296f8bac2fc9100cc216891.
Try to delete image to see if block vignette building
Revert 1226087..07738ce

This rolls back to commit 1226087e5817e3d867f537d834259a24d971659a.
Add the option BuildVignettes: false to avoid stop in package building
Add LazyData and No compilation
no build vignette in description to avoid crash when build
Turn off lazydata because crash vignette compilation due to read.csv
Add the html files to commits
Merge branch 'dev' into vignette

Conflicts:
	.gitignore
	inst/doc/usage.R
	inst/doc/usage.Rmd
First complete version of the usage vignette
fix #58
Merge branch 'vignette' into dev