More licensing ergonomic changes for embedding Dynalink into other works.

Summary: referencing actual license filenames in source code distribution from
  license boilerplate in every source code file was a bad idea, as it overly
  restricts embedders in their choice of packaging the copyright notices (i.e.
  they can't merge them into a single third party notices file).

Details:
- Removed explicit reference to license files from individual files'
  boilerplate text, so that embedders don't have to preserve them under the
  same name and location in their source distribution.
- Since license file names are no longer hardwired in license boilerplate
  texts, removed "Dynalink" from the file names; it's not necessary to ensure
  their uniqueness anymore as embedders are now free to move or rename them or
  aggregate them into a single third-party notice file.
- Every individual file now contains full standard application text for both
  the Apache License and for the BSD License instead of references to license
  file names.

Pedantic fix:
- Removed the phrase "All Rights Reserved" where it was present, as it is not
  necessary anywhere in the world since August 23, 2000, when all signatories
  of the Buenos Aires Convention also became signatories of the Berne
  Convention, see <http://en.wikipedia.org/wiki/All_rights_reserved>.