Added hyperlinks on github credit "mentions"

Author: danielhenrymantilla

README.rst

@@ -53,7 +53,7 @@ Recent Changes
   - Added a `.exactly_one() <https://docs.rs/itertools/0.9.0/itertools/trait.Itertools.html#method.exactly_one>`_
     iterator method that, on success, extracts the single value of an
     iterator
-    ; by @Xaeroxe
+    ; by `@Xaeroxe <https://github.com/Xaeroxe>`_
 
   - Added combinatory iterator adaptors:
 
@@ -72,7 +72,7 @@ Recent Changes
             vec![2, 1],
         ]
 
-      ; by @tobz1000
+      ; by `@tobz1000 <https://github.com/tobz1000>`_
 
     - `.combinations(k) <https://docs.rs/itertools/0.9.0/itertools/trait.Itertools.html#method.combinations>`_:
 
@@ -86,7 +86,7 @@ Recent Changes
             vec![1, 2],
         ]
 
-      ; by @tobz1000
+      ; by `@tobz1000 <https://github.com/tobz1000>`_
 
     - `.combinations_with_replacement(k) <https://docs.rs/itertools/0.9.0/itertools/trait.Itertools.html#method.combinations_with_replacement>`_:
 
@@ -103,11 +103,11 @@ Recent Changes
             vec![2, 2],
         ]
 
-      ; by @tommilligan
+      ; by `@tommilligan <https://github.com/tommilligan>`_
 
   - Improved the performance of `.fold() <https://docs.rs/itertools/0.9.0/itertools/trait.Itertools.html#method.fold>`_-based internal iteration for the
     `.intersperse() <https://docs.rs/itertools/0.9.0/itertools/trait.Itertools.html#method.intersperse>`_ iterator
-    ; by @jswrenn
+    ; by `@jswrenn <https://github.com/jswrenn>`_
 
   - Added
     `.dedup_by() <https://docs.rs/itertools/0.9.0/itertools/trait.Itertools.html#method.dedup_by>`_,
@@ -118,27 +118,27 @@ Recent Changes
     `.merge() <https://docs.rs/itertools/0.9.0/itertools/trait.Itertools.html#method.merge>`_ and
     `.kmerge() <https://docs.rs/itertools/0.9.0/itertools/trait.Itertools.html#method.kmerge>`_,
     but taking an additional custom comparison closure parameter.
-    ; by @phimuemue
+    ; by `@phimuemue <https://github.com/phimuemue>`_
 
   - Improved the performance of `.all_equal() <https://docs.rs/itertools/0.9.0/itertools/trait.Itertools.html#method.all_equal>`_
-    ; by @fyrchik
+    ; by `@fyrchik <https://github.com/fyrchik>`_
 
   - Loosened the bounds on `.partition_map() <https://docs.rs/itertools/0.9.0/itertools/trait.Itertools.html#method.partition_map>`_
     to take just a ``FnMut`` closure rather than a ``Fn`` closure, and made its
     implementation use internal iteration for better performance
-    ; by @danielhenrymantilla
+    ; by `@danielhenrymantilla <https://github.com/danielhenrymantilla>`_
 
   - Added convenience methods to
     `EitherOrBoth <https://docs.rs/itertools/0.9.0/itertools/enum.EitherOrBoth.html>`_ elements yielded from the
     `.zip_longest() <https://docs.rs/itertools/0.9.0/itertools/trait.Itertools.html#method.zip_longest>`_ iterator adaptor
-    ; by @Avi-D-coder
+    ; by `@Avi-D-coder <https://github.com/Avi-D-coder>`_
 
   - Added `.sum1() <https://docs.rs/itertools/0.9.0/itertools/trait.Itertools.html#method.sum1>`_
     and `.product1() <https://docs.rs/itertools/0.9.0/itertools/trait.Itertools.html#method.product1>`_
     iterator methods that respectively try to return the sum and the product of
     the elements of an iterator **when it is not empty**, otherwise they return
     ``None``
-    ; by Emerentius
+    ; by `@Emerentius <https://github.com/Emerentius>`_
 
 - 0.8.0