README,Color:Update document

Author: tsuyoshicho

README.md

@@ -41,6 +41,7 @@ Module						 | Description
 [Assertion](doc/vital/Assertion.txt)		 | assertion library
 [Async.Promise](doc/vital/Async/Promise.txt)	 | An asynchronous operation like ES6 Promise
 [Bitwise](doc/vital/Bitwise.txt)		 | bitwise operators
+[Color](doc/vital/Color.txt)                     | color conversion library between RGB/HSL/terminal code
 [ConcurrentProcess](doc/vital/ConcurrentProcess.txt)	 | manages processes concurrently with vimproc
 [Data.Base64](doc/vital/Data/Base64.txt)	 | base64 utilities library
 [Data.Base64.RFC4648](doc/vital/Data/Base64/RFC4648.txt)	 | base64 RFC4648 utilities library

doc/vital.txt

@@ -166,6 +166,7 @@ LINKS					*Vital-links*
   |vital/Assertion.txt|		assertion library.
   |vital/Async/Promise.txt|	An asynchronous operation like ES6 Promise
   |vital/Bitwise.txt|		bitwise operators.
+  |vital/Color.txt|             color conversion library between RGB/HSL/terminal code
   |vital/ConcurrentProcess.txt|	Manages processes concurrently with vimproc.
   |vital/Data/Base64.txt|	base64 utilities library.
   |vital/Data/Base64/RFC4648.txt|	base64 RFC4648 utilities library.