Hmf

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**Enhancments**

- Included an option to use delta_halo as compared to critical rather than mean density (thanks to A. Vikhlinin and anonymous referree)

**Bugfixes**

- Couple of bugfixes for fitting_functions.py
- Fixed mass range of Tinker (thanks to J. Tinker and anonymous referee for this)

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**Enhancments**

-Added a whole suite of tests against genmf that actually work

**Bugfixes**

- Fixed bug in mgtm (thanks to J. Mirocha)
- Fixed an embarrassing error in Reed07 fitting function
- Fixed a bug in which dndlnm and its dependents (ngtm, etc..) were calculated wrong
if dndlog10m was called first.
- Fixed error in which for some choices of M, the whole extension in ngtm would be NAN and give error

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**Features**

- Added ability to change resolution in CAMB from hmf interface
(This requires a re-install of pycamb to the newest version on the fork)

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**Features**

- Added Behroozi Fit (thanks to P. Behroozi)

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**Features**

- Ability to calculate fitting functions to whatever mass you want (BEWARE!!)

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**Features**

- Added Eisenstein-Hu fit to the transfer function

**Enhancments**

- Improved docstring for Perturbations class

**Bugfixes**

- Corrections to Watson fitting function from latest update on arXiv (thanks to W. Watson)
- **IMPORTANT**: Fixed units for k and transfer function (Thanks to A. Knebe)

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