…::WaitRequest() which works in Visual Studio.

… declaration of the following types with includes:

  - CMedium in MediumList.h
  - CRelation in RelationList.h
  - CSecondaryType in SecondaryTypeList.h
  - CISWC in ISWCList.h
* Adding MB_API __declspec macro to defines.h to ensure that musicbrainz5 will export a lib file in VS
* Annotating the following with MB_API:
  - Class declarations which need to be exported
  - MusicBrainz5::operator << defined in Entity.h
* Conditionally excluding the <strings.h> import in mbtest.cc in VS environments

…d with MB_API

…XMLPARSER_DLL for the musicbrainz5 project when using MSVC generators

…t way until it's tested.

* Documenting procedure for libmusicbrainz5 VS solution generation

* Moving MinTimeBetweenRequestsInSeconds