Ok, so I should've had inverted comma's when adding the "1.0.0" to the v...

...ersion. Turns out when running validation:

14:04:18 sarel@sarel.local SFDatabaseArchiveBundle develop ? composerphar validate
./composer.json is valid, but with a few warnings
See http://getcomposer.org/doc/04-schema.md for details on the schema
The version field is present, it is recommended to leave it out if the package is published on Packagist.