chapter about concepts analysis

Rewritten-docs.md

@@ -258,9 +258,12 @@ wishes of university users. Most notable features are following:
 @todo: describe detailed usage ... grading and this kind of stuff
 
 
-### Implementation analysis
+### Solution concepts analysis
+
+@todo: what problems were solved on abstract and highl levels, how they can be solved and what was the final solution
 
-@todo: GENERALLY... what problems were solved, how they can be solved and what was the final solution
+
+### Implementation analysis
 
 @todo: backend: what should be the structure, how many components and which one, mention scalability possibilities of current solution