Prepare 1.6.3

ChangeLog

@@ -5,7 +5,7 @@ Pylint NEWS
 What's new in Pylint 1.6.3?
 ===========================
-Release date: tba
+Release date: 2016-07-18
     * Do not crash when inferring uninferable exception types for docparams extension

pylint/__pkginfo__.py

@@ -10,7 +10,7 @@ from os.path import join
 modname = distname = 'pylint'
-numversion = (1, 6, 2)
+numversion = (1, 6, 3)
 version = '.'.join([str(num) for num in numversion])
 install_requires = [