Merge pull request #21 from subhacom/subhasis

Updated UniformData to add dt and tunit as arguments at construction
Updated UniformData to add dt and tunit as arguments at construction
time (after Upi's suggestion). Updated hh-example with very short
'hello-world' type example.
Initiated NSDFReader.
Added function to get uniform data row by source id and field name.
`timeunit` attribute name changed to `tunit` to match proposal.
NSDFReader - passing test to get uniform data.
Updated docs to include nsdf reader.
Passes unit tests for getting uniform, nonuniform and event data for
ONED dialect.
Now NSDFReader can read all three kinds of data.
Merge pull request #22 from subhacom/subhasis

NSDFReader basic implementation
Added a function to store directory/file contents under
/model/filecontents.
Put fixes in path handling for writing model directory. Added example
using extrenal NeuroML model with MOOSE.
Merge pull request #23 from subhacom/subhasis

Implemented writing directory contents under model
compression options now passed the model writing functions.
All the file level attributes converted to properties.
These are: title, contributor, creator, tstart, tend, software, license,
rights, method, and description.
Merge pull request #24 from subhacom/subhasis

Switched to property in stead of setters for file level attributes
Merge pull request #25 from subhacom/chaitanya

Merged examples by Chaitanya
adding necessary files for NeuroML example, and some comments for moose_multi example