Legacy renderer (#1184)

* Include two versions of Marked.js

* Include two versions of Marked.js

* Working two different render pipelines

Adds stylesheet "styleLegacy.less"
Adds markdownHandler "markdownLegacy.js"
The BrewRenderer will switch between these and the new pipeline dependent on the "version" prop passed in.

* Mustache-style div blocks

* Legacy snippets & columnbreak

* Codemirror styling for Div Blocks

* Lint

* Codemirror highlights for inline Divs as well

These will turn red `{{class Content}}`

Multi-line divs will turn purple

```
{{class,class2
content
}}
```

No real need for these to be different colors. Just for testing.

* More lint

* Update dependencies.

* Adding Button to switch render pipelines

* Update Marked.js

* Popup alert to refresh page when renderer changed

* Don't compress files in Development (very slow)

* Block DIV or inline Span depending on {{ placement

* \column emits a Div instead of Span

* Allow share page to use new renderer

* {{ divs no longer need empty lines. Spans work in lists.

* Typo

* Typo

* Enforce \page must be at start of line. Code cleanup.

* Inject newlines after/before {{/}} to avoid needing blank lines

* Fixes issues with tables.

* Remove console.log

* Fix spacing issue for Spans

* Move things from Brewrenderer to Markdown

Try to keep all custom text fiddling in one spot.

* Rename variables

* Update Font-Awesome to v5.15. Fix style issues on popups.

* Update {{ Divs/Spans, Fix nested hilighting

* Fixed Spans/divs with no tags or just commas

* Use blacklist for {{ to allow more characters

* Update package-lock.json

* Update all icons to Font-awesome 5

* V3 hidden behind config variable

Add "globalThis.enable_v3 = true" in the console to enable.

* lint

client/homebrew/pages/sharePage/sharePage.jsx

@@ -22,7 +22,8 @@ const SharePage = createClass({
 				shareId   : null,
 				createdAt : null,
 				updatedAt : null,
-				views     : 0
+				views     : 0,
+				renderer  : ''
 			}
 		};
 	},
@@ -59,7 +60,7 @@ const SharePage = createClass({
 
 				<Nav.section>
 					<PrintLink shareId={this.processShareId()} />
-					<Nav.item href={`/source/${this.processShareId()}`} color='teal' icon='fa-code'>
+					<Nav.item href={`/source/${this.processShareId()}`} color='teal' icon='fas fa-code'>
 						source
 					</Nav.item>
 					<RecentNavItem brew={this.props.brew} storageKey='view' />
@@ -68,7 +69,7 @@ const SharePage = createClass({
 			</Navbar>
 
 			<div className='content'>
-				<BrewRenderer text={this.props.brew.text} />
+				<BrewRenderer text={this.props.brew.text} renderer={this.props.brew.renderer} />
 			</div>
 		</div>;
 	}