Bugfix: Fix gemspec binary filter
Feature: Add a protected emailable private key when initializing

This will allow users to be able to send their private key to their teammates
securely.

Closes #17

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Change-Id:     I65324c29677be39b8d8cf9e3a0a1535948fab6ca
Signed-off-by: Jeff Felchner <accounts+git@thekompanee.com>
Refactor: Extract chamber key filenames into separate methods

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Change-Id:     Ic23ddc739ac27f726dbffa21585c09e97e54166e
Signed-off-by: Jeff Felchner <accounts+git@thekompanee.com>