refactor; adds support for siemens mr dicoms
refactor; all dicoms use same parser class
refactor; dicom parser uses composer pattern

- one dicom parser to rule them all
adds fxns to get properties by list of type tuples
use dicom header to identify GE multicoil
hand merge changes to master since branching
adds acq file properties, improves dict_merge
updates docs, license and readme, and adds travis
rename epochs,experiments to acquisition,projects
use nims_metadata_status to tell if meta is bad

- None, metadata is invalid
- empty, metadata parsing has not been started
- pending, metadata is in process
- complete, metadata is complete
hand merge rotate bvecs with Rx rotation

- hand merge rev b9044dc from master
cni-nims1.1
default to only writing montage of primary dataset
stops screenshots from clobbering dicoms
stop metaextractor crashing on value-vr mismatch
catch all exceptions unless debug mode is true
travis builds/deploys docs if tests pass