Hmf

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**Bugfixes**

- Fixed some warnings for non-updated variables passed to update()

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**Enhancments**

- Added better warnings for non-updated variables passed to update()
- Made default cosmology WMAP7

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**Enhancments**

- Added warning for k*R limits

**Bugfixes**

- Couple of minor bugfixes
- **Important** Angulo fitting function corrected (arXiv version had a typo).

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**Bugfixes**

- Urgent Bugfix for updating cosmology (for transfer functions)

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**Bugfixes**

- Few bugfixes

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**Features**

- Added cascading variable changes for optimization
- Added the README
- Added update() function to simply change parameters using cascading approach

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