[lmi] Various group-quote improvements

[Greg Chicares]

Originals here:
  https://github.com/vadz/lmi/pull/2

| Refactor: extract split_into_lines() in a header …                6aa2c5f

Committed, in spirit, 20151009T0156Z, revision 6333.

| Replace hard coded summary fields with "Comments" contents …      dc257c7

Committed 20151009T0200Z, revision 6334.

| Refactor: add a function for converting fields to HTML …          033fbbd

Committed 20151009T0255Z, revision 6335.

| Add a margin on the right hand side of the summary box …          e5cfc2e

Committed 20151009T0257Z, revision 6336.

| Make comments entry field multiline in the group carve out skin … 91697ca

Committed 20151009T0259Z, revision 6337.

Then I committed a few changes of my own that the preprocessor discards
before the compiler ever sees them, and a patch from Kim that uses the
intended product name.