[Ftr] Snappier scripts with tiered compilation

[l3nz]

Is your feature request related to a problem? Please describe.

Quicker startup f scripts under the JVM

Describe the solution you'd like

I came across https://www.petefreitag.com/item/930.cfm where it suggests tiered compilation.

If the default toycalc.clj is

   ./toycalc.clj  4.44s user 0.14s system 292% cpu 1.570 total

With tiered you get

    ./toycalc.clj  1.57s user 0.10s system 132% cpu 1.266 total

So you get 65% saving on user and and 20% on total

Version / Platform

0.5.3 / JVM

TODO

• All JVM Scripts
• README