- bug fix in node_processor, Block#open_process, handle case of nil title
First draft: [env.theorem]
Primitive toolchain: pre and post processor, block processor (env)

The toolchain can now handle the "environment block"

   [env.theorem]

with either the html or latex backend. Note that the second
element of the environment block is variable and not defined
in advance.  Thus one has the usual [env.proposition],
[env.definition], [env.lemma], etc, but also [env.joke],
[env.prayer] ... whatever you need.
Added HTML handler for env, added ClickBlock class
Changed puts to warn and DEVELOPMENT to $VERBOSE
Added tests in ./tests. See the README there.

Supressed a few more warn statements with if $VERBOSE
Wired processors to converter, register some conditionally, add tests.

- Register some processors according to the backend used

- Use HTML5 handler (code from @mojavelinux) for
  EnvironmentBlock and ClickBlock

- Now have a decent eyeball-controlled test suite.
  See the README in ./tests
ClickBlock is fully supported with hackish PrependProcessor.
Better css for both [env.foo] and [click.bar] elements via HTML handler..
Started adding resources for cucumber tests
bup null
The construct [env.eq] now works in HTML.

- Note that improvements are needed
  in numbering equations. But nowe
  they _are_ numbered.
The equation construct [env.eq] now works in HTML.

Add math.adoc
Change [env.eq] to [env.equation] (and save five lines of code:-)
Change signal for numbering from * to %numbered, save more code:-)
Added directory try-out with contents for first users
Simplified the root README.adoc
According context, puts \input MyEnviroment.tex or NewEnvironment.tex
Resoleve

	lib/asciidoctor-latex/converter.rb
	lib/asciidoctor-latex/environment_block.rb
EnvironmentBlock now treats titles & numbering like ClickBlock

- Fixed [env.equation]
- Cleanup, improve docs