"_new" function implementation
Const-correctness of the code and new function
read_input and reas_source reimplmented with data structures
read_network with data_structures
solve instead of solve_new with fonctionning test
Correction of a lot a memory leak trough valgrind
Finalizing use of data structure
allocation and desallocation to allow valgrind use
memory leak correction
Merge pull request #4 from mwestphal/data-structures

Implement functions that use the new data structures