EXAMPLES
========
- remove old crappy examples, move in new ones from the new tutorials

WRITE
=====

- bring back "write=no" into XML tag to skip some variables
- complete error logging
- undef value (also func: adios_undef_get(), adios_undef_set())
- each method should process parameters from PairStruct, not from string


READ
====
- peek_ahead function to support paraview
- chunking: 
  - support memory limit

- missing data blocks when read should contain undef values

- simple BP reader
    - PG block                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            