Changed readFileNifti => niftiRead in multiple locations.
Remove niftiWriteMatlab, while inserting its contents into niftiWrite.
Changes in and around mrvCompile

1. Added back some old c files, that were needed for compilation
2. Adjusted mrvCompile and defaultCFileList, so that the path to the c files is
automagically found.
This solves compilation errors for readFileNifti and writeFileNifti.
Merge pull request #79 from arokem/nifti_read

Nifti read