Update of test cases with new version of Linty VHDL parser
Added makefile to launch tests
Correct version of the two_counters exported json file
Added two_counters example
Counters, programmable pulse, d-latch VHDL examples
Update of d-latch sample
Test file update for typo
Added example from some courses
Updated tests for lustrei vhdl import
Added tests for vhdl import and export (pp)