Marble 2.0

Refactoring goals towards a Marble 2.0 version.

Marble Library Split

Split libmarblewidget into several libraries:

• libMarbleCore
  • Non-interactive classes, e.g. geodata, file parsing
  • No dependency to QWidgets or Qt Quick
• libMarbleMap
  • Interactive, UI toolkit independent classes, e.g. layers, graphicsview
  • Dependency to MarbleCore
  • No dependency to QWidgets or Qt Quick
• libMarbleWidgets
  • QWidget related interactive classes
  • Dependency to QWidget, libMarbleMap, libMarbleCore
• libMarbleQuick
  • Qt Quick 2.0 related interactive classes
  • Dependency to QtQuick, libMarbleMap, libMarbleCore

Header normalization

• The header structure in src/lib/ should match the exported headers in include/. No "flattening" as it happens currently where e.g. marble/geodata/* is copied to /marble/.
• During compilation, the subdirectories of marble/ are not added to the compiler search path anymore, so #include statements need to use the full path marble/$module/$class.h for files outside their directory.
• Headers follow the directory structure marble/$module/$path, where $path is either a filename or a directory + filename, but not deeper nested