Refactor comment and attendance code

(from [134347e832207ff3453ed314b6c53f41be7df949]) Eager-load commitment and user data, and start manipulating them in memory. [#70 Refactor comment and attendance code] https://github.com/marnen/quorum2/commit/134347e832207ff3453ed314b6...

(from [ad38d01bdc92a2011f895c01f93c06a381d28413]) Fix failing specs. [#70 Refactor comment and attendance code] https://github.com/marnen/quorum2/commit/ad38d01bdc92a2011f895c01f9...

(from [03d73e2225cd673c9c8b5574825b7c179c5c874e]) Use let instead of before block. [#70 Refactor comment and attendance code] https://github.com/marnen/quorum2/commit/03d73e2225cd673c9c8b557482...

(from [5d6d31f02cb8a282ee05c0062f35d1c267e51d20]) Use better string concatenation syntax. [#70 Refactor comment and attendance code] https://github.com/marnen/quorum2/commit/5d6d31f02cb8a282ee05c0062f...

(from [75c7ee9abb4e71dbba2b3e0eb95b6331f101cde0]) Reimplement helper so as not to do DB access. [#70 Refactor comment and attendance code] https://github.com/marnen/quorum2/commit/75c7ee9abb4e71dbba2b3e0eb9...

(from [a67f03d518fde3bcf39ef231ae1380e5b1155011]) Don't make a separate query for find_committed. [#70 Refactor comment and attendance code] https://github.com/marnen/quorum2/commit/a67f03d518fde3bcf39ef231ae...

(from [34b2f3b831046744a54f4a8a9aa4bcafe9fd980c]) Remove comment that's now inaccurate. [#70 Refactor comment and attendance code] https://github.com/marnen/quorum2/commit/34b2f3b831046744a54f4a8a9a...

(from [352edd5736bd2867560f21fe1083ac09731eb8d6]) Refactor. [#70 Refactor comment and attendance code] https://github.com/marnen/quorum2/commit/352edd5736bd2867560f21fe10...

(from [748d0137fd1e23fda73296ef67b0efd268230319]) Escape HTML properly. [#70 Refactor comment and attendance code] https://github.com/marnen/quorum2/commit/748d0137fd1e23fda73296ef67...

(from [5f14c7269bf0dde0071e39bb1027981e19a2ab48]) Remove scopes that we no longer need. [#70 Refactor comment and attendance code] https://github.com/marnen/quorum2/commit/5f14c7269bf0dde0071e39bb10...

(from [773bb0ab1c2723c3810e45a37d2be123188e2a8f]) Move variable into helper. [#70 Refactor comment and attendance code] https://github.com/marnen/quorum2/commit/773bb0ab1c2723c3810e45a37d...

(from [ac5d803b6c15b29392f4a38b1c476a82e4d0e00a]) Remove FormBuilder since we're not using it. [#70 Refactor comment and attendance code] https://github.com/marnen/quorum2/commit/ac5d803b6c15b29392f4a38b1c...

(from [12cb19d0e4a377de4e7e9a52ae3769dd79a8980a]) We can just use the comparator that we already defined in User. [#70 Refactor comment and attendance code] https://github.com/marnen/quorum2/commit/12cb19d0e4a377de4e7e9a52ae...

(from [69f7f3441186f7331083b76783541728a2a00faa]) Fix comment rendering (and commit neglected file!). [#70 Refactor comment and attendance code] https://github.com/marnen/quorum2/commit/69f7f3441186f7331083b76783...