Directdm

Added
- Weak mixing below the weak scale, as detailed in [this publication](https://arxiv.org/abs/1801.04240)
- Note that the results for electrons and muons neglect potentially large contributions; hence, a warning is issued in these cases

Changed
- Replaced argument name `mchi` by `DM_mass`
- Updated nucleon masses from [PDG](http://pdg.lbl.gov/)

Fixed
- A bug in `write_mma` (RG evolution was not switched of by optional argument `RGE=False`)
- The charm quark is now consistently integrated out at 2 GeV
- A bug in c1p for complex scalar DM

Added
- The module `single_nucleon_form_factors.py` with the classes for the single-nucleon form factors

Fixed
- A bug in cNR11n and cNR12n
- A bug in the NLO value for cNR5

Changed
- All expressions for the cNR are now given directly in terms of form factors
- Updated input values for nuclear magnetic moments

Added
- Remaining dimension-seven operators below the electroweak scale
- This `Changelog.md` file

Removed
- Removed the optional argument `dict` everywhere; output is now always a python dictionary

Changed
- The `example.py` now includes examples for the new operators, and no examples relating to the `dict` option
- Updated the input values for the quark contributions to the nucleon magnetic moments

Fixed
- Bug in RGE option for cNR
- Standard order of scalar Wilson coefficients
- Error in 3-flavor anomalous dimension

Added
- This `CHANGELOG.md` file.
- The arXiv number of the companion paper for the low energy constant values.
- `DirectDM/formfactors.m` and related changes to implement the form factor expressions in [1708.02678](https://arxiv.org/abs/1708.02678).
- NLO option to the `ComputeCoeffs` function.
Changed
- Alpha_EM value for matching at 2GeV is now Alpha_EM(0) rather than Alpha_EM(M_Tau).
- Low energy constants to match [1708.02678](https://arxiv.org/abs/1708.02678).
Fixed
- Extra factor of 2 in Majorana and real scalar matching.
- Alpha_s flavor scheme for running between 3 and 2 GeV.
- Minus sign and factor of 2 in anomalous dim. for GGdual mixing in pseudo-scalar current.
Removed
- Unneeded comments in the code.

Added
*Initial release*

- `directdm` package folder
- `example.py`
- `setup.py`
- `README.md`
- `LICENCE`