Preparation of meeting and guide for drawing basic geometric elements in the dgeometry module

[bogumilchilinski]

The following actions are to do, in order to prepare the meeting and the guide:

• [x] bogumilchilinski/dgeometry#16

• [x] #17

• [x] #18

[amvdek]

The meeting was led by @grzegorzdl with the help of @amvdek and @bogumilchilinski

[amvdek]

Pending guide improvement.