* Initial fiasco writer api
* Lot of new checks and code cleanup
* fiasco callback now receives a filedescriptor inside header_t
- the lseek and data free is autonatically done by the main loop
* Split fiasco_data_read() code, useful for streams (embeddeds low mem footprint)
* Add '-P' flag to create a new fiasco pack
* Up version to 0.3
* Alphabetically order the help message flags
* Cleaner short help message
* Pseudo-api for creating firmwares (not yet finished)
* Add '-F' flag to flash from a fiasco image