v2.0

• Major version update due to the fact that some APIs have changed and may break existing builds in some corner cases.
• Allowing dynamic memory allocation for message classes without virtual destructors.
• Updating protocol framing read operations to allow retrieval extra info (may break some corner cases existing builds).
• Split available options into comms::option::def::X (applicable to protocol definition) and comms::option::app::X (applicable to application customization) ones.
• Added a couple of generic input processing and message dispatching auxiliary functions.
• Improved import of the COMMS library into CMake projects.
• Dropped support for gcc-4.7 due to the fact that its C++11 support is incomplete and compiler crashes in some cases.