OpenMAMA-6.2.2-rc1

This is a maintenance release which fixes several outstanding bugs and introduces some new functionality. Key feeatures include:

• Introduction of pluggable DQ strategies (Market Data Subscription recovery mechanisms). See https://openmama.github.io/openmama_rfc_dq_pluggability.html
• Added new methods mamaMsg_toJsonString and mamaMsg_toNormalizedString to the C layer
• OpenMAMA source structure moved to maven and build system moved to gradle
• Cmake support now available (experimental). Note it will replace scons in the next release and supports Windows, Linux and OSX
• OpenMAMA added to Microsoft vcpkg for easy nuget packaging and building from source
• OpenMAMA Integration headers now available to allow developers to build plugins and bridges without access to the source code
• Added implementation for mamaPrice_setFromString
• MamaPrice can now support decimal point precision up to 16 places
• Implement MamaFieldCache in JNI enhancement
• Support for setting mamaDateTime with pre-1970 dates on Unix platforms
• Removal of Visual Studio compiler warnings
• Added appveyor integration for CI
• Add support for autoloading payload bridges from config

For a complete list of all 54 issues included in this release, please see here: https://github.com/OpenMAMA/OpenMAMA/milestone/8?closed=1