message: (WIP) Add the formal charges handler to sdf parser
diff: */
  import { Column } from '../../../mol-data/db';
  -import { MolFile, handleAtoms, handleBonds } from '../mol/parser';
  +import { MolFile, handleAtoms, handleBonds, handleFormalCharges } from '../mol/parser';
  import { Task } from '../../../mol-task';
  import { ReaderResult as Result } from '../result';
  import { Tokenizer, TokenBuilder } from '../common/text/tokenizer';
  @@ -29,7 +29,6 @@ export interface SdfFile {
  const delimiter = '$$$$';
  -const formalChargePrefix = 'M CHG';
  function handleDataItems(tokenizer: Tokenizer): { dataHeader: Column<string>, data: Column<string> } {
  const dataHeader = TokenBuilder.create(tokenizer.data, 32);
  @@ -37,10 +36,6 @@ function handleDataItems(tokenizer: Tokenizer): { dataHeader: Column<string>, da
  while (tokenizer.position < tokenizer.length) {
  const line = Tokenizer.readLine(tokenizer);
  - if (line.startsWith(formalChargePrefix)) {
  - console.log('charge found');
  - console.log(line);
  - }
  if (line.startsWith(delimiter)) break;
  if (!line) continue;
  @@ -101,10 +96,11 @@ function handleMolFile(tokenizer: Tokenizer) {
  const atoms = molIsV3 ? handleAtomsV3(tokenizer, atomCount) : handleAtoms(tokenizer, atomCount);
  const bonds = molIsV3 ? handleBondsV3(tokenizer, bondCount) : handleBonds(tokenizer, bondCount);
  + const formalCharges = handleFormalCharges(tokenizer,1)
  const dataItems = handleDataItems(tokenizer);
  return {
  - molFile: { title, program, comment, atoms, bonds },
  + molFile: { title, program, comment, atoms, bonds, formalCharges },
  dataItems
  };
  }
  