Conflicts:
	ChangeLog

From jinmei: ``It's not intended for general purpose use, and only
our internal micro benchmark tools need it.''

 - implementation for setProto() added
 - EXPECT_NO_THROW around many object creations added

- added passing by reference in many places
- started using writeUint16/readUint16 functions

- test clean-up and improvements

- Added V6ADDRESS_LEN and V4ADDRESS_LEN
- Removed unnecessary parameters to Option constructors
- Many missing Doxygen comments added
- using sizeof(uintXX_t) instead of 2 and 4 in pack()/unpack()
- Many other smaller changes.

- Option6Lst is now Option6Collection
- Corrected data_len_ mistake in Option::pack4
- Added comments about length calculation
- Added doxygen comments
- Some const and references added
- Many other minor changes.

 - added consts in packOption6, unpackOptions6
 - removed version() method
 - alignments fixed in dhcp6.h

- buffer type changed: char => uint8_t
- removed unnecessary statements in Makefile.am

- Dhcpv6Srv::process*() methods does not use references anymore
- Dhcpv6Srv::shutdown variable added for ordered shutdown procedure
- Dhcpv6Srv is now in isc::dhcp namespace
- Dhcpv6Srv is now derived from boot/noncopyable
- IfaceMgr methods and fields are now commented appropriately
- IfaceMgr
- Dhcpv6Srv friend declaration removed
- Dhcpv6SrvTest now uses derived class to access protected methods
- Dhcpv6SrvTest Solicit_Basic test now includes client-id, checks for
  received client-id, server-id and content of ia
- IfaceMgrTest minor improvements

See comments in #1186 ticket for extensive list of smaller changes
and reasons behind them.

- include paths fixed
- dangling spaces removed
- many parameters are now passed by reference
- added doxygen comments for all methods in dhcp6_srv.h
- src/bin/dhcp6/Makefile.am no longer references Pkt6.{cc|h}

- similar to from_string() used in underlying boost::asio::address

Loopback interface name is now constant;
Function comments added;

Advertise is not perfect yet:
- server-id is missing
- client-id conveys invalid content

 - IfaceMgr now uses shared_ptr.
 - skeleton functions for specific message processing added.
 - tests fixed.