Added Documentation link.

README.md

@@ -5,6 +5,8 @@
 [![Coverage Status](https://coveralls.io/repos/sambitdash/LabelNumerals.jl/badge.svg?branch=master&service=github)](https://coveralls.io/github/sambitdash/LabelNumerals.jl?branch=master)
 [![codecov.io](http://codecov.io/github/sambitdash/LabelNumerals.jl/coverage.svg?branch=master)](http://codecov.io/github/sambitdash/LabelNumerals.jl?branch=master)
 
+[Documentation Link](https://sambitdash.github.io/LabelNumerals.jl/docs/build/)
+
 Numeric quantities are used sometimes for pure representational purposes without any true a
  numeric significance. For example, the page numbering is carried out using simple arabic
  numerals, roman numerals, alphabets. These numbers have additive properties but may not
@@ -21,7 +23,7 @@ Numeric quantities are used sometimes for pure representational purposes without
   1. LetterNumeral - A, B, ..., Z, AA, BB, ..., ZZ, AAA... (group of 26 characters each)
   2. ArabicNumeral - 1, 2, 3, ...
   3. LookupNumeral - Mapped strings to integers like English words "One", "Two" etc.
-  4. AlphaNumNumeral - Alphabets representing numbers like BA, BB, BC etc. 
+  4. AlphaNumNumeral - Alphabets representing numbers like BA, BB, BC etc.
 
  It also supports `RomanNumeral` from
  [`RomanNumerals`](https://github.com/anthonyclays/RomanNumerals.jl) package.