Render file paths as text in base64

Rendering raw blob data presents significant security issues, but
getting raw data can still be useful for programmatic usage. For such
use cases, provide base64-encoded data as the TEXT output format.

Bug: https://code.google.com/p/gitiles/issues/detail?id=7
Change-Id: I8d9352a216e434e70adb0e5810044d9fa5ecbd0b
1 file changed