Megatest

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Try writing to in-memory db and every 2-5 seconds syncing to megatest.db
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First, how much time will it take to write back the changes:

1. Get the run table

(define (get-all db)(let ((res '()))(for-each-row (lambda (a . b)(set! res (cons (apply vector a b) res))) db "SELECT * FROM tests;") res))
(define tdata (let ((start (current-milliseconds))(res (get-all *db*)))(print (- (current-milliseconds) start))res))

Result ranges from 34ms to 89ms but mostly around 40ms for 623 records on moosefs

Projecting to 15000 records:

  Slow   2 seconds to read all
  Median 1 second to read all

This seems like it would work with an update period of 2-5 seconds

TODO
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1. open-db opens in-memory db and megatest.db, put handles in *memdb* and *db*, *memdb* is < run-id dbh >
2. Server is part of runtests 
   a. server start cycle - adapt to per run-id
      i. states; starting, started, stopping, stopped
   b. turn off write coalesing
3. Calls to -runtests, -remove-runs etc. 
   a. Might talk to running server if run specific
   b. Can talk to megatest.db but not a generally good idea
   c. Can start a runserver 
4. Dashboard is fine except for writes?

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[87cbe68f31] 
[be405e8e2e]

# FROM andyjpg on #chicken

(let ((original-exit (exit-handler)))