stress test medea, temporary fix
make ._getActiveFile to run asynchrnous
prepare to make wrapWriteFileSync asynchronous
now getActiveFile is really synchronous. Cool.
add test to read multiple files concurrently
cleanup
remove references to *Sync-methods in compactor
cleanup, remove unused
make all tests pass
data_file: use separate fd:s for reading & writing
cleanup
remove last *Sync-calls from meda.js
use append-stream instead of fs.createWriteStream
Merge pull request #32 from kesla/concurrent-writes-and-reads

Concurrent writes and reads