[license] Modify license and use Boost Software License 1.0.
[doc] Add documentation.
Add build and config files, and index.html.
Add all include files.
[test] Add test files.
Add .git.boost file if the library were to be a part of Boost libraries.
[test] Update Jamfile.v2.
[test] Update Jamfile.v2.
Merge branch 'master' of https://github.com/MarekKurdej/belief

Conflicts:
	test/Jamfile.v2
Rename dst -> belief.
Add Jamfile.v2 stubs.
Move readme and todo notes.
Rename belief -> beliefs.
Fix some compilation errors.
Rename communality -> commonality.
[test] Rename tests.