Disable PhantomJS HTML parser by default

[robhrt7]

In SourceJS 0.4 we introduced HTML API, that allows to cache the results of all code examples from the specs (.source_example blocks). Using this API via REST, engine allows to cover custom usage scenarios like testing code in environments where it's not possible to dynamically render HTML or using tools like Lego.

But since these scenarios are not that popular, we decided to turn off HTML parser by default, and in 0.6.0 transfer it to separate plugin (removing only parser part from core). REST API and HTML storage will be always available in the core, but to use PhantomJS parser, which allows to re-cache all the examples with the start of the app, or using cron, you will need to install separate SourceJS plugin.

In 0.5.3 feature will be still left in the core, but to enable it, you will need to define this option:

source/options.js

module.exports = {
    plugins: {
        htmlParser: {
            enabled: true,
            onStart: true
        }
    },
};

We still have big plans for HTML API in SourceJS, especially in combination with tools like Lego and others for designing in the browser, but to keep core clean we will be separating specific features to external plugins (with official support).

[robhrt7]

HTML parser is now prepared for separation and turned off by default 4e4d720