[#441] tcg_rim_tool option to embed cert in signature

[chubtub]

These changes do the following:

• Add a commandline option (-e|--embed-cert) to explicitly embed the signing certificate within the signature of a base RIM. -- If the -e option is not explicitly given only the publickey will be added to the signature.
• Add a unit test for -e.
• Clean up checkstyle formatting: line lengths, final paramters.

Closes #441