changelog updated + mailmap added

.mailmap

@@ -0,0 +1,7 @@
+Ali Paikan <ali.paikan@iit.it> <ali.paikan@gmail.com>
+Claudio Fantacci <claudio.fantacci@iit.it> <claudio.fantacci@gmail.com>
+Francesco Romano <francesco.romano@iit.it> <francesco.romano.1987@gmail.com>
+Lorenzo Natale <lorenzo.natale@iit.it> <lornat75@gmail.com>
+Nicolò Genesio <nicolo.genesio@iit.it>
+Silvio Traversaro <silvio.traversaro@iit.it> <pegua1@gmail.com>
+RTF Developers <rtf-devel@robotology.org> <icub@iiticubws027.icub.local>

doc/release/v1_4_0.md

@@ -1,4 +1,4 @@
-Robot Testing Framework 1.4.0 (UNRELEASED) Release Notes               {#v1_4_0}
+Robot Testing Framework 1.4.0 (2018-02-09) Release Notes               {#v1_4_0}
 ========================================================
 
 Important Changes
@@ -62,7 +62,13 @@ Contributors
 ------------
 
 This is a list of people that contributed to this release (generated from the
-git history using `git shortlog -ens --no-merges v1.3.0..v1.4.0`):
+git history using `git shortlog -ens --no-merges v1.2.0..v1.4.0`):
 
 ```
+    28	Nicolo' Genesio <nicolo.genesio@iit.it>
+    21	Daniele E. Domenichelli <daniele.domenichelli@iit.it>
+    11	Andrea Ruzzenenti <andrea.ruzzenenti@iit.it>
+     6	Damiano Enerli <damiano.enerli@iit.it>
+     5	Silvio Traversaro <silvio.traversaro@iit.it>
+     1	Nicolò Genesio <nicolo.genesio@iit.it>
 ```