updated documentation (#91)

* updated documentation

* add performance keyword

* add fast keyword

README.md

@@ -12,11 +12,13 @@
 [![Zipped Size][]][bundle phobia]
 [![Language][]][typescript]
 
-This library is a collection of high performance utilities from Set Theory,
-which operate on an arbitrary number of Sets by each accepting variable arguments.
+High performance set theory.
 
-Each utility function operates with the principals of immutability:
-none of the input sets are modified in the process or result of calculation.
+This library is a collection of functional utilities from set theory,
+each of which operate on an arbitrary number of input sets.
+
+Each function accepts variable arguments and operates with the principals of immutability:
+none of the input sets are modified in the process of calculation.
 
 
 ## Set Operations:

package.json

@@ -3,7 +3,7 @@
 	"version": "1.5.6",
 	"author": "Nathaniel Holden <holden@inanity.io> (https://inanity.io)",
 	"homepage": "https://github.com/kubikowski/set-utilities",
-	"description": "A collection of high performance utilities from Set Theory, which operate on an arbitrary number of Sets.",
+	"description": "High performance set theory - functional utilities which operate on arbitrary input sets.",
 	"license": "MIT",
 	"keywords": [
 		"set",
@@ -19,9 +19,9 @@
 		"disjoint",
 		"subset",
 		"superset",
+		"performance",
+		"fast",
 		"utilities",
-		"utility",
-		"utils",
 		"util"
 	],
 	"repository": {