Prepare 1.5.6

ChangeLog

 ChangeLog for Pylint
 --------------------
---
+2016-06-06 -- 1.5.6
+
     * config files with BOM markers can now be read.
       Close #864.

pylint/__pkginfo__.py

@@ -23,7 +23,7 @@ from os.path import join
 modname = distname = 'pylint'
-numversion = (1, 5, 5)
+numversion = (1, 5, 6)
 version = '.'.join([str(num) for num in numversion])
 install_requires = [