Limitations:
* no dname conversion yet (wrong ordering)
* some traversals won't be implemented (probably won't be needed)
* no index building yet (slow ordered search)

The reason is we break the aliasing rules a lot,
this is not neccessarily a bad thing but we need to either
choose to adhere to the rules and add code complexity or
disable it (only gcc attempts to do it by default).

- Added proper checks for writing beyond wire boundaries

- Disabled DNAME compression (was not working with AXFR)
- Fix in RR size function.

- Removed debug code from tcp-handler.c

- More verbose log message added to zone-load - RRSIG that has different TTL to its RRSet.

- removed: src/libknot/zone/dname-table.{c,h}

- rrset_binary_length -> rrset_binary_size
- removed zones_rrset_binary size and substituted calls to rrset_binary_size

- Makefile changes
- knotc_main converted

- Still one unsolved problem - connected with DNSKEY keytags, see TODOs in code.

Conflicts:
	src/knot/zone/semantic-check.c

- function rrset_find_rr_pos()

- Small changes in other files, mostly reenabling disabled calls.
- new RRSet API function: delete all rrs from RRSet using other RRSet, but do not create RRSet that contains removed RDATA.

- fix in rrset.c
- rewritten rdata_remove function

- knot_rrset_rdata_reset() - sets RDATA section of RRSet to default values
- knot_rrset_copy_rr_from_rrset() - adds RR from given position and RRSet to input RRSet

- rrset_remove_rdata_pos, rrset_find_rr_pos