Applying changes agreed on 25/11/13 meeting

* modified entity names: contrast_standard_error_map_id and
residual_mean_sum_of_squares_map_id
* design matrix stored as csv instead of png
* contrast name also stored in contrast_id entity
Fix: png -> csv

Also renamed residual_mean_sum_of_squares_map_id entity to
niiri:residual_mean_squares_map_id
Create activities and entities to get closer to Nipype
update svg and pdf
fix: placeholder outside parenthesis
rebasing gllmflndn code and adding estoimation activity
Merge pull request #3 from cmaumet/gllcoderebasedwithactivity

Rebasing according to ni-/ni-dm and keep statistical_estimation activity
Merge pull request #11 from gllmflndn/master

enh: new entities
update of all serializations.
Merge pull request #15 from gllmflndn/master

update of all serializations.
New SPM examples: 2 contrasts
Merge pull request #16 from cmaumet/newspmex

New SPM examples: 2 contrasts
initial spec doc styles/organization
Merge pull request #17 from dbkeator/master

initial spec doc styles/organization
Update README

Emphasise first letters of "Derived Data Working Group" as in "NeuroImaging Data Sharing"
Ignore pyc files in git repository
Create 2 activities instead of '"statistical_estimation"
Changes suggested on NIDASH call 06/01/2014

- Rename statistical_estimation in model_fitting
- No arrow between contrast_variance_map and staistical_map
- residual_mean_squares and design_matrix as input of
contrast_estimation

And also:
- No arrow between contrast_standard_error_map and
residual_mean_squares_map
Remove coordinateSystem attributes in peaks

Change suggested on NIDASH call 13/01/2014
Add separate coordinateSpace entity

Create two coordinateSpace entity to store voxelToWorldMapping,
voxelUnits, voxelSize, coordinateSystem, dimensions and
numberOfDimensions.

The first entity is member of data_scaling, beta_map_1, beta_map_2,
residual_mean_squares_map, contrast_variance_map, contrast_map,
statistical_map and excursion_set.

The second entity is member of search_space