Custom output format files

[inodb]

Allow changing the column names etc using a supplied output format file

Some of the output formats could be:

• tcga: https://docs.cbioportal.org/file-formats/#extended-maf-format. List all 37 first and anything extra goes in the back alphabetically
• minimal: whatever was inputted and newly annotated columns by genome nexus
• gdc: ??? Not sure what this should be yet. (They might have a few additional columns beyond tcga, 126 columns)
• any custom ordering of columns (already implemented)

[ozguzMete]

#198

magically removing empty columns is much more difficult hence the data is row-based. Doable but painful... if the output format is enough for most of the time, we can skip this part

[ozguzMete]

I have added tcga and minimal to the #198