[tutorial] Introduce more waf options and best work practices.
[Bug 1786] Make cairo implementation type accessible.
[Bug 1786] Fix undeclared identifiers cairo_impl64 and cairo_impl128 in int128 builds.
One waf to rule them all.
NetAnim: Allow metadata as default in the examples
NetAnim: Update Documentation
NetAnim: Add figures
Bug 1874 - Ipv4L3Protocol::ProcessFragment: addressCombination and idProto identifiers not properly computed
Bug 1870 - Remove unnecessary AsInt functions
Update RELEASE_NOTES
Ignore introduction of rogue waf scripts.
[Bug 1852] Restore missing config header
Bug 1855 - SixLowPanNetDevice is not correctly indexed
[wifi] reformat wifi-tx-vector.cc
Bug 1787 - Runtime error when using AnimationInterface::EnablePacketMetadata() to fetch metadata of CSMA packet
IPv[4,6] fragmentation tests include tag tests
[Bug 1653] Extension of CommandLine interface

Restore operator << (std::ostream, CommandLine) erroneously removed
in rev 10155.
fix for Bug 1443 - m_minDistance in FriisPropagationLossModel
[propagation] rescan Python binding
Bug 1294 - New PeekU8 () and Read (Buffer::Iterator start, uint32_t size) methods in Buffer::Iterator