Update documentation

README.markdown

@@ -48,6 +48,7 @@ GNU Affero General Public License version 3: <http://www.gnu.org/licenses/agpl-3
 Related projects
 ----------------
 
+- [Kanboard Presenter by David Eberlein](https://github.com/davideberlein/kanboard-presenter)
 - [CSV2Kanboard by @ashbike](https://github.com/ashbike/csv2kanboard)
 - [Kanboard for Yunohost by @mbugeia](https://github.com/mbugeia/kanboard_ynh)
 - [Trello import script by @matueranet](https://github.com/matueranet/kanboard-import-trello)

docs/analytics.markdown

@@ -22,6 +22,8 @@ Cumulative flow diagram
 
 This chart show the number of tasks cumulatively for each column over the time.
 
+Note: You need to have at least 2 days of data to see the graph.
+
 Burndown chart
 --------------
 
@@ -30,4 +32,11 @@ Burndown chart
 The [burn down chart](http://en.wikipedia.org/wiki/Burn_down_chart) is available for each project.
 This chart is a graphical representation of work left to do versus time.
 
-Kanboard use the complexity or story point to generate this diagram.
+Kanboard use the complexity or story point to generate this diagram.
+
+Don't forget to run the daily job for stats calculation
+-------------------------------------------------------
+
+To generate accurate analytics data, you should run the daily cronjob **project daily summaries** just before midnight.
+
+[Read the documentation about Kanboard CLI](http://kanboard.net/documentation/cli)

docs/screenshots.markdown

@@ -22,4 +22,4 @@ On Mac OS X, you can use those shortcuts to take screenshots:
 
 There are also several third-party applications that can be used to take screenshots with annotations and shapes.
 
-Note: This feature doesn't works with all browsers.
+**Note: This feature doesn't works with all browsers.**