Prep for 0.6.2 release (nilearn#2314)

* Updated to prep for 0.6.2 release

* Reduced the news entries of release versions to 4

Release 0.6.1 (nilearn#2292)

* Relese 0.6.1 prep: Updated Nilearn version number, web page, whats_new.rst

* Corrected release year for 0.6.1 on website

Release 0.6.0 (nilearn#2265)

* Fixed existing test for view_connectome's parameter deprecation

* Fixed existing tests for replace_parameters

* Create whats_new for 0.6.0 release

* COrrected version number

* Updated release announcement on website

Rel 060b0 (nilearn#2208)

* Updated whats_new

* Updated whats_new and .mailmap

* Updated release month in whats_new

Release Nistats 0.0.1b1 prep (nilearn#407)

* Updated list of contributors & version number for release

* Updated mailmap

* Updated mailmap - 2

* Set version to 0.0.1b1

Release Nilearn 0.6.0 alpha (nilearn#2164)

* Updated .mailmap

* Updated contributors list

* Removed unsupported python versions from PyPI tags

* Added whats_new entry for PR nilearn#2167

* Updated Whats whats_new list of contributors

Release Nilearn 0.6.0 alpha (nilearn#2164)

* Updated .mailmap

* Updated contributors list

* Removed unsupported python versions from PyPI tags

* Added whats_new entry for PR nilearn#2167

* Updated Whats whats_new list of contributors

Pinned Python version in travis-ci to 2.7

PR nilearn#1961 Nilearn Release 0.5.1

Release preparation for Nilearn v0.5.1

Nilearn 0.5.0 stable