datapackage should include committee membership details

[OriHoch]

datapackage should contain csv of details about which MKs are members of which committees

related issues:

• https://github.com/hasadna/knesset-data/issues/133
• https://github.com/hasadna/knesset-data-python/issues/10

[OriHoch]

@RavivBarzilay

[OriHoch]

after v1.3.0 we have the persons tables - but we still need to make the relation to committees @RavivBarzilay ^

[OriHoch]

also:

• fix the boolean value handling
• add tests