Fix index in fwave-slope reconstruction.
Merge branch 'master' of git://github.com/clawpack/pyclaw

* 'master' of git://github.com/clawpack/pyclaw:
  minor updates for the custom BCs and fix typo (probably) in setting BCs
Don't adjust time step based on an absolute size.
Merge pull request #261 from ketch/fix_timestep_control

Fix timestep control