Examples and clean-ups (#1)

- Attempt at implementing an example for DRS
- Complete reactions set
- New automaton
- Formula
- Fixed automaton scaling
- Proc index in the formula
- Benchmark generators
- Scripts to reproduce experiments for reaction mining

experiments/reaction_mining_mutex/bench_mutex_nonparam_oldimpl_mem.dat

@@ -0,0 +1,20 @@
+2 68.765625
+3 73.140625
+4 71.625000
+5 73.359375
+6 79.234375
+7 75.578125
+8 79.812500
+9 85.828125
+10 81.718750
+11 79.828125
+12 83.984375
+13 80.406250
+14 75.859375
+15 85.812500
+16 89.093750
+17 84.296875
+18 89.078125
+19 87.609375
+20 88.281250
+21 85.406250