Basis-set-exchange

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* Adds converters
* GAMESS UK
* deMon2K
* xTron

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* Adds data from old BSE:
* Adds rest of LANL (LANL08, LANL2TZ, LANL2DZDP)

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* Adds dalton output format

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* Fixes bug in make_general when shell contains duplicate exponents (59)
* Remove harmonic_type in favor of function_type
* Remove cartesian/spherical from s and p orbitals
* Fixes issue with sorting of basis sets
* Adds data from old BSE:
* Basic cc-pwCVXZ
* Basic (aug)-cc-pCVXZ
* Basic dunning DK
* CCJ basis sets
* EMD basis sets of Lehtola
* Rest of Jensen basis sets
* ahlrichs variations: dhf and x2c
* (aug)-cc-pCVXZ-DK
* cc-pwCVXZ-DK3
* Adds updated v1 data:
* Jorge basis sets

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* Fix metadata error with modified LANL2DZ

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* Fixes windows compatibility
* Fixes filenames with asterisks
* Consistent use of utf-8 encoding
* Adds modified LANL2DZ of Couty-Hall