Is free test really useful in the current form?

[porosnie]

A free test can occur in relation with a value and it is prefixed with "#". However, most of the rules that use free test do not fit in this structure. The free test is frequently a more complex condition, such as calculating the distance between two positions, etc. In that case, the whole elementary condition needs to be implemented manually.

Proposal:

• remove free test and just define an additional elementary condition that is free test as a whole;

[porosnie]

see also #12 , which will reduce the number of free test used in elementary conditions