Changes

=== Ideas for future releases ===

=== Ideas for future releases ===

* Interoperability with other activities, Measure, StopWatch

* Graph StopWatch data '''DONE'''

* Graph Measure data

* Show a help tutorial when activity is started from scratch  

* Show a help tutorial when activity is started from scratch  

* Share, edit the data with your friends

* Share, edit the data with your friends

* Check if we can create the image without using one (or several) tempfile/s.

* Check if we can create the image without using one (or several) tempfile/s. '''DONE'''