Cla contributor table

[nitinsubz]

This PR shows CLA's that a user is considered a contributor as.

At the bottom of the home CLA screen, there now exists a table that lists all the CLA's that the user is covered by.

A few questions:

• Right now if there are no CLA's, then the table simply does not exist all together. Is that fine?
• I am only getting the addendums for each agreement under 'AddendumType.CONTRIBUTOR'

Fixes #196

[codecov[bot]]

Codecov Report

Merging #277 (bea4351) into master (271efd6) will increase coverage by 0.72%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #277      +/-   ##
==========================================
+ Coverage   89.77%   90.50%   +0.72%     
==========================================
  Files           9        9              
  Lines         313      337      +24     
  Branches       22       25       +3     
==========================================
+ Hits          281      305      +24     
  Misses         32       32              

Impacted Files	Coverage Δ
common/model/agreement.js	92.45% <100.00%> (+1.75%)	:arrow_up:
common/model/appUser.js	96.77% <100.00%> (+0.47%)	:arrow_up:

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[teone]

The feature appears to be working fine, but can we add the Signer of the Agreement and the Company (if any) to the table?