- `MlabObjectProxy` trying to iter and len a proxy now throws; indexing w/   strings is now properly escaped; more slicing support - `CurlyIndexer` no longer uses weakrefs and is now only created on-demand - proper checking for sparse matrices
- `MlabObjectProxy` trying to iter and len a proxy now throws; indexing w/
  strings is now properly escaped; more slicing support
- `CurlyIndexer` no longer uses weakrefs and is now only created on-demand
- proper checking for sparse matrices

aschmolck/mlabwrap,aschmolck/mlabwrap,aschmolck/mlabwrap