Use gzip as dist format, not lzma

Signed-off-by: Raul Gutierrez S <rgs@itevenworks.net>
Ignore tarballs

Signed-off-by: Raul Gutierrez S <rgs@itevenworks.net>
Ignore *.log and *.trs

Signed-off-by: Raul Gutierrez S <rgs@itevenworks.net>
Add basic worker abstraction

Signed-off-by: Raul Gutierrez S <rgs@itevenworks.net>
Add util-internal.h to hide things that shouldn't be public

Signed-off-by: Raul Gutierrez S <rgs@itevenworks.net>