release/4.0: fix branch name of README.md
Bump version to 4.0.2
Merge pull request #2122 from marutosi/finn/release/4.0/README.md-travis

release/4.0: fix branch name of README.md
TimeEntries spent_on date display fix.

The detail view of logged time entries does not show the logged date
(spent_on), but instead displays the current time.

Using the date directive as an element tag with date-value set
seems to fix the issue.
Make star icon accessible by keyboard
Recover watch icon style
Merge pull request #2157 from opf/hotfix/time_entry_spent_dates

TimeEntries spent_on date display fix.
Merge pull request #2158 from opf/hotfix/16455_star_watch_icon_in_details_pane_not_accessible

Hotfix/16455 star watch icon in details pane not accessible
Add install and upgrade information for CentOS/RHEL and Ubuntu
Merge pull request #2166 from opf/hotfix/update_docs_supported_distros

Add install and upgrade information for CentOS/RHEL and Ubuntu
Make the installation prerequisites more consistent with regard to CentOS/RHEL, Fedora and Ubuntu
formatting of bullets
rewriting i18n tests as specs
one class variable less
Merge pull request #2165 from opf/hotfix/i18n_testing_as_specs
Fix the URL for the stable branch of Fedora 20 packager
Merge pull request #2172 from lindenthal/release/4.0

Fix the URL for the stable branch of Fedora 20 packager
Correct API experimental's users path
Merge pull request #2177 from opf/hotfix/17173_user_related_wp_filters_are_inactive

17173 User related WP filters are inactive
Consider width limitation in wiki