Merge pull request #18 from pscholz/master

Fixed zapbirds bug
Added off-pulsed reduced chi^2 estimation function
Added -fixchi flag for show_pfd
Added -fixchi to prepfold
Merge branch 'master' into pfd_improvements
Added flag to turn off bad-block checking
Replaced buggy simplefold() with a call to simplified call to fold()
Merge branch 'master' of github.com:scottransom/presto
Added DOF_corr() to fix chi2 and made numtrials an option for estimate_offsignal_redchi2
Changed rms_correction() to use DOF_corr instead
Added chi2 DOF correction stuff
Change the number of parts to the number of records if there are less records than parts
Changed the way the we read 1-bit PSRFITS.  Also de-code 2-bit data.
Added Vlad Kondratiev's nice pulsestack.py script to bin/
Added LWA as a supported telescope for polyco generation
Merge pull request #21 from paulray/lwa_polycos

LWA polycos and Vlad's pulsestack.py script added.
Added support for tempo2 toa generation
Added LWA as telescope in misc_utils.c
added .dylib to .gitignore
Merge branch 'lwa-bugfix' into placeholder

* lwa-bugfix:
  added .dylib to .gitignore
  Added LWA as telescope in misc_utils.c