Memory allocations stats in automated fashion, this PL is base on my previous one

Here the generated output: just run sh/run-allocations.rb :)

| Framework            | Tot. alloc. | Tot. mem.  |
| :------------        | -----:     | -----:     |
| rack                 |         56 |       1704 |
| mustermann           |         71 |       2040 |
| cuba                 |         72 |       1936 |
| hobbit               |         72 |       2024 |
| rack-response        |         79 |       3072 |
| lotus-router         |         91 |       2080 |
| brooklyn             |         98 |       2432 |
| nancy                |        108 |       3408 |
| rambutan             |        116 |       3448 |
| nyny                 |        118 |       3912 |
| sinatra              |        255 |      10031 |
| rails                |        388 |      15335 |
| ramaze               |        579 |      23837 |
| scorched             |       1751 |     126876 |