Added auto wrap option (and grammar) for sequenceDiagrams

Added inline config and init(ialization) grammar
Added reinitialize functionality to mermaidAPI (not to be confused with initialize)
Added actorFontWeight, noteFontWeight, messageFontWeight, wrapEnabled, wrapPadding
Added wrapLabel and breakWord functions to intelligently wrap text based on a pixel-based width instead of column-based
  - The implementation is largely from Carys Mills: https://medium.com/@CarysMills/wrapping-svg-text-without-svg-2-ecbfb58f7ba4
  - Made slight modifications for mermaid-js
Fixed dark theme color inconsistencies for sequence diagrams
Removed !important from sequence scss as this prevents any client overrides
Fixed various invalid css values in sequence scss which prevented proper rendering of various elements
Added detectInit to utils for initialization json detection
Updated detectType to support the existence or absence of the intialization configuration
Updated calculateTextWidth to include fontWeight

src/diagrams/sequence/sequenceDb.js

@@ -1,4 +1,5 @@
 import { logger } from '../../logger';
+import { getConfig, setConfig } from '../../config';
 
 let prevActor = undefined;
 let actors = {};
@@ -6,6 +7,7 @@ let messages = [];
 const notes = [];
 let title = '';
 let sequenceNumbersEnabled = false;
+let wrapEnabled = false;
 
 export const addActor = function(id, name, description) {
   // Don't allow description nulling
@@ -92,6 +94,16 @@ export const enableSequenceNumbers = function() {
 };
 export const showSequenceNumbers = () => sequenceNumbersEnabled;
 
+export const enableWrap = function() {
+  wrapEnabled = true;
+};
+
+export const disableWrap = function() {
+  wrapEnabled = false;
+};
+
+export const autoWrap = () => wrapEnabled;
+
 export const clear = function() {
   actors = {};
   messages = [];
@@ -213,6 +225,16 @@ export const apply = function(param) {
       case 'parEnd':
         addSignal(undefined, undefined, undefined, param.signalType);
         break;
+      case 'config':
+        try {
+          let cfg = param.config;
+          let _config = getConfig();
+          let config = Object.assign(_config, cfg);
+          setConfig(config);
+        } catch (error) {
+          logger.error('Error: unable to parse config');
+        }
+        break;
     }
   }
 };
@@ -221,8 +243,11 @@ export default {
   addActor,
   addMessage,
   addSignal,
+  enableWrap,
+  disableWrap,
   enableSequenceNumbers,
   showSequenceNumbers,
+  autoWrap,
   getMessages,
   getActors,
   getActor,