Adding vignette listing all functions
Tweaks
Added weightedMean()
Added 'Testing for and counting values'
Merge branch 'develop' into feature/vignette-methods
Added count()
Tweaks
Merge branch 'develop' into feature/vignette-methods
Updated list-of-methods vignette
Cleaned up the list-of-functions vignette
Minor tweaks
Tweaks to vignette
Merge branch 'feature/vignette-methods' into develop

Conflicts:
	DESCRIPTION
More vignette tweaks