Update documentation for Epics filtered search and Group Roadmap

doc/README.md

@@ -54,6 +54,7 @@ GitLab.com is our SaaS offering. It's hosted, managed, and administered by GitLa
 - [Groups](user/group/index.md): Organize your projects in groups.
   - [Subgroups](user/group/subgroups/index.md)
   - **(Ultimate)** [Epics](user/group/epics/index.md)
+  - **(Ultimate)** [Roadmap](user/group/roadmap/index.md)
   - **(Starter/Premium)** [Contribution Analytics](user/group/contribution_analytics/index.md): See detailed statistics of group contributors.
 - [Search through GitLab](user/search/index.md): Search for issues, merge requests, projects, groups, todos, and issues in Issue Boards.
   - **(Starter/Premium)** [Advanced Global Search](user/search/advanced_global_search.md): Leverage Elasticsearch for faster, more advanced code search across your entire GitLab instance.

doc/user/group/epics/index.md

@@ -6,6 +6,8 @@ Epics let you manage your portfolio of projects more efficiently and with less
 effort by tracking groups of issues that share a theme, across projects and
 milestones.
 
+![epics list view](img/epics_list_view.png)
+
 ## Creating an epic
 
 A paginated list of epics is available in each group from where you can create
@@ -57,6 +59,27 @@ link in the issue sidebar.
 
 ![containing epic](img/containing_epic.png)
 
+## Searching for an epic from epics list page
+
+> Introduced in [GitLab Ultimate][ee] 10.5.
+
+You can search for an epic from the list of epics using filtered search bar (similar to
+that of Issues and Merge requests) based on following parameters:
+
+- Title or description
+- Author name / username
+
+![epics search](img/epics_search.png)
+
+To search, go to the list of epics and click on the field **Search or filter results...**.
+It will display a dropdown menu, from which you can add an author. You can also enter plain
+text to search by epic title or description. When done, press <kbd>Enter</kbd> on your
+keyboard to filter the list.
+
+You can also sort epics list by **Created date** or **Last updated**.
+
+![epics sort](img/epics_sort.png)
+
 ## Permissions
 
 If you have access to view an epic and have access to view an issue already

doc/user/group/roadmap/index.md

+# Roadmap
+
+> Introduced in [GitLab Ultimate][ee] 10.5.
+
+An Epic within a group containing **Planned start date** and/or **Planned finish date**
+can be visualized in a form of a timeline (e.g. a Gantt chart). The Epics Roadmap page
+shows such a visualization for all the epics which are under a group and/or its subgroups.
+
+![roadmap view](img/roadmap_view.png)
+
+## Timeline duration
+
+![roadmap timeline](img/roadmap_timeline.png)
+
+Roadmap shows epics which have planned start or finish dates _falling within_ or
+_going through_ the **past 3 months** or **next 3 months** from today, where _today_
+is shown by the vertical red line in the timeline. The dates underneath the month on
+the timeline header represent the starting day (Sunday) of the week.
+
+## Timeline bar for an epic
+
+The timeline bar indicates the approximate position of an epic based on its planned start
+and finish date. If an epic doesn't have a planned finish date, the timeline bar fades
+away towards the future. Similarly, if an epic doesn't have a planned start date, the
+timeline bar becomes more visible as it approaches the epic's planned finish date on the
+timeline.