Fix issue #9

Eligius does not require a password, so make it default to the empty string.
Empty passwords do not work for Eligius

Use the same value that bfgminer uses: -1 (Eligius ignores this anyway)
Fix strict aliasing problems so -fno-strict-aliasing is no longer needed
CFLAGS tuning for PowerXCell 8i and GCC 4.7
Merge branch 'patch-2'

* patch-2:
  Empty passwords do not work for Eligius
  Fix issue #9
Reduce longpoll timeout to improve reaction times in case of network issues
Calculate queue size dynamically based on number of SPEs
Merge branch 'feature/latency'

* feature/latency:
  Calculate queue size dynamically based on number of SPEs
  Reduce longpoll timeout to improve reaction times in case of network issues
Merge branch 'feature/tuning'

* feature/tuning:
  CFLAGS tuning for PowerXCell 8i and GCC 4.7
  Fix strict aliasing problems so -fno-strict-aliasing is no longer needed