Overview of simulations.

Gather information using write_seed_info.py of the EAS simulations and
generate corsika.h5. This information is retrieved using
read_seed_info.py.
Added numbers of ground particles
Remove local paths
Skip bad h5 files

If the h5 files has no groundparticles table, skip it.
In the future this script should check which seeds are being processed
or have a better try/except clause.
Flush after each line and rename main function
Merge branch 'refactor_simulations' into simulation_overview

Update simulation_overview with latest changes
Catch a possible exception and add a progressbar

Also rename footer to end (more consistent)
Add logger

Also rename script to generate overviews
Remove script to output some lines from the overview
Fix capitalization, logger.info not INFO
Use walk instead of glob

Just try to open files, catch exceptions.
Get list of files before creating results table to set expected rows
Rename and reorder

Delay getting a new row to when the data has been retrieved
Rename functions
Remove some obsolete lines
Flush data more often while generating the overview
Add functions to convert between particle name/pid

Function to handle converting between particle codes and names.
Read attributes from new location

This way we do not need to open the groundparticles table first
Opening a Table node can be costly, for some reason it takes a
lot longer for large files, even if no data is being accessed.
Rename output file

seed_info.h5 -> simulation_overview.h5
First make overview in temp file, then move to destination
Update a docstring
Set umask to give group equal access
Merge pull request #18 from HiSPARC/simulation_overview

Add script to generate a hdf5 file with info about the simulations.
The resulting hdf5 file can be used to find simulations
with specific parameters.