Distribution > Figure out license type for all new files, and add licensing information to files. (Arrow)

[argmarco-tkd]

Include:

• Imports of cppcodec-src for base64 conversions

[argmarco-tkd]

Implemented in

• Updating license to Apache 2.0 (Arrow code) #202 (Arrow code)
• Distribution > Add licensing for DBPS files DataBatchProtectionService#154 (DBPS code)