Feature: Remove tmate since it requires a tap (shellwreck will install)

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Change-Id:     I1a066b603194a0f158707978a667d5a292b5630f
Signed-off-by: Jeff Felchner <accounts+git@thekompanee.com>
Feature: Don't install documentation when installing gems

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Change-Id:     Icd332ae5d110d973bbb9e6cd1e5fe8fc3d5333f6
Signed-off-by: Jeff Felchner <accounts+git@thekompanee.com>
Bugfix: Properly determine whether a gem is currently installed

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Change-Id:     I9cfcb77ff76d1405d352c7a65a3c112ad518b7c8
Signed-off-by: Jeff Felchner <accounts+git@thekompanee.com>