Ping! Mode and DR Blending

PING mode

• When ping=True alleles in P-groups are included in addition to the alleles in G-groups in the corresponding lg/lgx groups.

DR Blending

• Support DRBX Blending from DRB1

`py-ard` REST Service

py-ard REST Service

• REST service with /redux, /validate, /mac endpoints
• Run in a Docker container

BugFix for HLA Prefix

See #165

Reduce to Shortnulls

Implement shortnulls behavior with new config variable set to True by default.

This will address things like DRB4*01:03N and DRB5*01:08N both in terms of accepting them as valid and also by expanding them as appropriate to the list of longer alleles that have the same expression character.

DRB5*01:08N is acceptable by WHO rules since all suballeles have N.
DRB4*01:03N is acceptable by WMDA (but not WHO) rules but this needs to be handled for things like HF analysis by expansion to something valid (vs rejection) to avoid bias

When there are multiple expression characters in the same group defined by a shortname create multiple shortnulls for the same WHO group. e.g.

{'N', 'L'}  A*02:01
{'L', 'Q'}  A*02:01:01
{'L', 'Q'}  A*24:02
{'L', 'Q'}  A*24:02:01
{'L', 'Q'}  A*31:01
{'N', 'Q'}  A*31:01:02
{'N', 'Q'}  B*15:01
{'N', 'Q'}  B*15:01:01
{'N', 'Q'}  B*44:02

See #154 and #155

Support shortnull

Implements shortnulls behavior with new config variable set to True by default.

This will address things like DRB4*01:03N and DRB5*01:08N both in terms of accepting them as valid and also by expanding them as appropriate to the list of longer alleles that have the same expression character.

DRB5*01:08N is acceptable by WHO rules since all suballeles have N.
DRB4*01:03N is acceptable by WMDA (but not WHO) rules but this needs to be handled for things like HF analysis by expansion to something valid (vs rejection) to avoid bias

Summary Table for Batch

Show summary table for failed alleles.

Summary
-------
35 alleles failed to reduce.
| Column  Name    |      Allele      |      Did you mean ?
| --------------- | ---------------- | -------------------------
| r_A_TYPE1       | A*24:09          | A*24:09N
| r_A_TYPE1       | A*33:157         | A*33:157N
| r_A_TYPE1       | A*26:25          | A*26:25N
| r_A_TYPE1       | A*23:19          | A*23:19N
| r_A_TYPE1       | A*24:02:01:02    | A*24:02:01:02L

Fix batch regression error

Fix regression error for MAC reduction #152

Add reduce_2field reduce option

Batch csv pyard-reduce-csv takes in reduce_2field option to reduce 2 fields alleles like B*15:220, DPB1*104:01 and A*02:642

Stricter Data Validation

Version 0.7.0 has stricter data validation. It will not silently fail by returning an empty '' string. It'll return of the Invalid exceptions in pyard.exceptions when calling redux_gl method with invalid GL String.

See CHANGELOG.md for full changelog.

Fix for IMGT URL Change

Fixes a breaking change where all allele lists in IMGTHLA repo have been moved to /allelelist/ subdirectory.