Speeded up set_infer_chanlocs for large data (a bit).
Reset the debug flag in flt_pipeline (was left on by accident).
Speeded up filter_fast (uses fftfilt() if available, falls back to Octave implementation otherwise).
Compiled Rice Wavelet toolbox for Linux.
Substantial improvements:
* fixed issues with the caching system
  - better decision rule, no longer attempting to estimate the time to reload the input to a calculation from disk
  - more reliable method to determine free RAM
  - added optional fast hashing method to hlp_diskcache (spot_hashing option)
* utl_resolve_streams largely rewritten
  - should now always succeed, but may warn about ambiguity or poor match
  - tries to be less smart about what channels/types a stream provides
  - somewhat simpler and better documented
  - removed some code duplication
* fixed marker timing in run_readlsl
  - had an incorrect calculation before; new method not perfect yet, will see one more update
* improved flt_iir:
  - much longer extrapolation period to let the initial state settle
  - ensures that the data sign is correct
  - correctly estimates the filter delay
  - works on any number of extra dimensions in the data
* improved flt_resample:
  - works on any number of extra dimensions
  - properly extrapolates state into the past
* fixed matching rule in set_infer_chanlocs for BioSemi recordings
  - new uses case-insensitive exact matching rather than substring matching

- updated help text in bcilab.m and bcilab_config.m
- optimized cov_shrink (uses bsxfun instead of repmat)
- removed verbose startup message from cvx_setup
- renamed .ckf format to .sto format
- added ability to return string fingerprint to hlp_fingerprint
- updated io_save to work with an updated dependency
- changed onl_peek to implicitly return all channels if desiredchannels is set to []
- changed onl_simulate to internally calculate prediction positions in samples rather than seconds to avoid rounding errors
- added support for a configurable UpdateInterval to play_eegset_lsl
- speeded up new montage deduction code in set_infer_chanlocs, using better caching mechanisms
- set_selinterval now accepts Inf as upper cutoff in seconds (meaning end-of-data)