Create README.rst
Modify README
Merge branch 'develop'
Fix issue with one-line files
Fix issue with index file path
Fix issue with index file path
Fix file name
Resolved conflicts in indexfile/index.py
Added set_format method
Save/open default self.path if no path specified
Set self.path when saving to different index file
Fix issue when select has no arguments
Fix issue creating lookup table when no type attribute is present
Fix issue storing relative path for the index file
Fix issue with loading just metadata
Add update option to when adding files to a dataset
Implemented add command
Implement remove feature for files and datasets
Implement rm command
Load format from IDX_FORMAT environment variable if no --format argument specified