new release

[jwdevantier]

• nested components supported
• syntax change
• empty Lua lines (%) now permitted, can use to format code
• docs: fix cross-referencing links bug
• docs: update to reflect new syntax
• docs: remove concept of directives, now there are components and Lua code blocks
• add LICENSE file
• add README.md file
• api: htt.Component.is -- check if value is a component
• api: all components now have a .name attribute containing the name they were defined with

Defining components, before:

% @component foo
...
% @end

Defining components, now:

% <foo>
...
% </foo>

Lua code blocks, before:

% @code
...
% @end

Lua code blocks, now:

%%%
...
%%%