Re-factored default_beta_ladder outside PTSampler object, and added optional arguments for specifying Tmax instead of ntemps.
Added flatchain property to ptsampler.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	emcee/ptsampler.py
Update testimonials.rst

Sparre et al. (2013) added to testimonials.
Merge remote-tracking branch 'upstream/master'
[faq] Add section on C++ wrapping, pickling, and parameter limits
Merge pull request #74 from martinsparre/master

Update testimonials.rst
Merge pull request #77 from fredRos/master

[faq] Add section on C++ wrapping, pickling, and parameter limits
Re-licensing under MIT
another remaining GPL reference
updating license in document
updated docs to 2.0 and cleaned up the front page layout
updating-ish testimonials list... can't keep up!
starting a fitting-a-line example
first draft of fitting a line example
Adding PyPI badges
Update testimonials.rst
Merge pull request #80 from lauralwatkins/patch-1

Update testimonials.rst
Added new reference to testimonials
Merge pull request #81 from adrn/apw-references

Added new reference to testimonials