* Builds a higher level AST view. I creates a list with each contract as an object in it.
* Example contractsOut:
*
* {
* "node": {}, // actual AST Node of the contract
* "functions": [
* {
* "node": {}, // actual AST Node of the function
* "relevantNodes": [], // AST nodes in the function that are relevant for the anlysis of this function
* "modifierInvocations": [], // Modifier invocation AST nodes that are applied on this function
* "localVariables": [], // Local variable declaration nodes
* "parameters": [] // Parameter types of the function in order of definition
* }
* ],
* "modifiers": [], // Modifiers definded by the contract, format similar to functions
* "inheritsFrom": [], // Names of contract this one inherits from in order of definition
* "stateVariables": [] // AST nodes of all State variables
* }
*
* @relevantNodeFilter {ASTNode -> bool} function that selects relevant ast nodes for analysis on function level.
* @contractsOut {list} return list for high level AST view
* @return {ASTNode -> void} returns a function that can be used as visit function for static analysis modules, to build up a higher level AST view for further analysis.
