Setup development branch.

Dependencies are not pinned down, but follow their
respective development branches.

Our version is generated on build time using git
(e.g. it requires a git cloned repository to build).

The NEWS files is flushed, so it only contains the
bullets of news since the last release merge.
New option for 0-based list access (fixes #156)
Fix tuple access (related to #155)
New option for 0-based tuple access (#156)
Merge branch 'master' into stable

Conflicts:
	NEWS.md
	rebar.config
	src/erlydtl.app.src

Resolved conflicts to keep master a development branch, with a clean
NEWS file, while the stable branch has the full NEWS history and
pinned dependencies and a hard coded version in the .app.src file.