Support operations

[przemoc]

Operations:

• info - default one
• check
• cat
• resize
• import
• export
• mount
• internal - format specific actions and modifications

VDI specific actions and modifications:

• --compact
• --linearize
• --format=FORMAT
• --blk-count=BLK_COUNT
• --bam-alignment=ALIGNMENT
• --bam-offset=OFFSET
• --data-alignment=ALIGNMENT
• --data-offset=OFFSET
• --do-not-move-bam
• --do-not-move-data
• ...

It's advisable to implement operations for particular formats on top of format specific actions and modifications. Format specific actions/modifications may be useful for power users.

This issue will be splitted in future.