- check() method added in Option class. Constructors are now simpler.
- compilation fix in option_unittest.cc

ChangeLog entry added (it covers all recent DHCPv4 tickets)
New constructor in Option class.
Added new unittest for new construtor.
Minor improvements in pkt4_unitests.

- Missing tests for Pkt4 implemented.
- Option::addOption() now supports DHCPv4 options.
- Pkt4::addOption(), getOption() implemented.
- Include paths fixed in Makefile.am

- More code migrated to vector<uint8_t>
- Option4Collection type deemed unnecessary and removed
- Removed data_len_ field. data_.size() will be used instead
- unitests for new functionalities in Option class implemented

- getData() now returns const vector<uint8_t>&
- several skeleton tests added
- implemented Option::getUniverse()
- Internally Option uses vector<uint8_t> to keep data. However, to avoid
  refactoring of all DHCPv6 code at this stage, API still uses
  share_array<uint8_t>. There is separate ticket for fixing this.

Conflicts:
	src/lib/dhcp/tests/pkt4_unittest.cc

- Pkt4::getBuffer() added.
- Pkt4::pack(), unpack() implemented.
- tests for new functionality implemented.

Proper solution (enabled, passing tests that use generateTestPacket2()
function) is available in #1226 that is currently under review.

- Pkt4::getBuffer() added.
- Pkt4::pack(), unpack() implemented.
- tests for new functionality implemented.

this is a workaround for build problem for the solaris buildbot (both g++ and
sunstudio); they don't seem to work well with the const iterator in operator!=.

directly pushing.

localstatedir.  (e.g.) /usr/local/var/bind10-devel instead of /usr/local/var.

also updated the EOL code of auth/spec_config.h.pre.in from CR+LF (DOS style)
to LF (unix style), mainly for consistency.

directly pushing.