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/editor/snippetbar/snippetbar.jsx

@@ -5,7 +5,8 @@ const _     = require('lodash');
 const cx    = require('classnames');
 
 
-const Snippets = require('./snippets/snippets.js');
+const SnippetsLegacy = require('./snippetsLegacy/snippets.js');
+const SnippetsV3 = require('./snippets/snippets.js');
 
 const execute = function(val, brew){
 	if(_.isFunction(val)) return val(brew);
@@ -19,7 +20,14 @@ const Snippetbar = createClass({
 			onInject       : ()=>{},
 			onToggle       : ()=>{},
 			showmeta       : false,
-			showMetaButton : true
+			showMetaButton : true,
+			renderer       : ''
+		};
+	},
+
+	getInitialState : function() {
+		return {
+			renderer : this.props.renderer
 		};
 	},
 
@@ -28,6 +36,11 @@ const Snippetbar = createClass({
 	},
 
 	renderSnippetGroups : function(){
+		if(this.props.renderer == 'V3')
+			Snippets = SnippetsV3;
+		else
+			Snippets = SnippetsLegacy;
+
 		return _.map(Snippets, (snippetGroup)=>{
 			return <SnippetGroup
 				brew={this.props.brew}
@@ -44,7 +57,7 @@ const Snippetbar = createClass({
 		if(!this.props.showMetaButton) return;
 		return <div className={cx('snippetBarButton', 'toggleMeta', { selected: this.props.showmeta })}
 			onClick={this.props.onToggle}>
-			<i className='fa fa-info-circle' />
+			<i className='fas fa-info-circle' />
 			<span className='groupName'>Properties</span>
 		</div>;
 	},
@@ -69,7 +82,7 @@ const SnippetGroup = createClass({
 		return {
 			brew           : '',
 			groupName      : '',
-			icon           : 'fa-rocket',
+			icon           : 'fas fa-rocket',
 			snippets       : [],
 			onSnippetClick : function(){},
 		};
@@ -80,7 +93,7 @@ const SnippetGroup = createClass({
 	renderSnippets : function(){
 		return _.map(this.props.snippets, (snippet)=>{
 			return <div className='snippet' key={snippet.name} onClick={()=>this.handleSnippetClick(snippet)}>
-				<i className={`fa fa-fw ${snippet.icon}`} />
+				<i className={snippet.icon} />
 				{snippet.name}
 			</div>;
 		});
@@ -89,7 +102,7 @@ const SnippetGroup = createClass({
 	render : function(){
 		return <div className='snippetGroup snippetBarButton'>
 			<div className='text'>
-				<i className={`fa fa-fw ${this.props.icon}`} />
+				<i className={this.props.icon} />
 				<span className='groupName'>{this.props.groupName}</span>
 			</div>
 			<div className='dropdown'>