message: make store repository path case insensitive
  Store repository lookup path as lower case
  Related to
diff: @@ -204,7 +204,7 @@ export class GitHubPlugin extends ConverterComponent {
  if (!this.repositories.hasOwnProperty(path)) {
  continue;
  }
  - if (fileName.substr(0, path.length) === path) {
  + if (fileName.substr(0, path.length).toLowerCase() === path) {
  return this.repositories[path];
  }
  }
  @@ -212,7 +212,7 @@ export class GitHubPlugin extends ConverterComponent {
  // Try to create a new repository
  const repository = Repository.tryCreateRepository(dirName, this.gitRevision);
  if (repository) {
  - this.repositories[repository.path] = repository;
  + this.repositories[repository.path.toLowerCase()] = repository;
  return repository;
  }
  