Changes to gnatt.jison

1. Removed the hash and semicolon symbols from the title regex to allow for their use.
2. Removed the hash and semicolon symbols from the section regex to allow for their use.
3. Removed the hash and semicolon symbols for the taskTxt regex to allow for their use. I did not remove the colon because the parser fails to recognize when the actual taskData begins if that distinctions isn't kept.
4. Removed the regex \#[^\n]* which skipped comments to fix some bugs with hash symbols in the taskTxt. I tested this changed by putting it back and using the comment  to see if it was recognized as a comment, but I would receive a syntax error and the diagram would not be rendered. So, I think we can safely remove that line, BUT it would be best practice if someone else tested this change to ensure that this will not break anyone's Gantt diagrams.

packages/mermaid/src/diagrams/gantt/parser/gantt.jison

@@ -5,7 +5,7 @@
  */
 %lex
 
-%options case-insensitive
+%options case-insensitivegit
 
 %x click
 %x href
@@ -31,7 +31,6 @@ accDescr\s*"{"\s*                                { this.begin("acc_descr_multili
 
 [\n]+                   return 'NL';
 \s+                     /* skip whitespace */
-\#[^\n]*                /* skip comments */
 \%%[^\n]*               /* skip comments */
 
 /*
@@ -86,10 +85,10 @@ weekday\s+friday                return 'weekday_friday'
 weekday\s+saturday              return 'weekday_saturday'
 weekday\s+sunday                return 'weekday_sunday'
 \d\d\d\d"-"\d\d"-"\d\d          return 'date';
-"title"\s[^#\n;]+               return 'title';
+"title"\s[^\n]+               return 'title';
 "accDescription"\s[^#\n;]+      return 'accDescription'
-"section"\s[^#:\n;]+            return 'section';
-[^#:\n;]+                       return 'taskTxt';
+"section"\s[^\n]+            return 'section';
+[^:\n]+                       return 'taskTxt';
 ":"[^#\n;]+                     return 'taskData';
 ":"                             return ':';
 <<EOF>>                         return 'EOF';