Minor bugs and improvements

[encelo]

Those are some small bugs I have discovered recently:

• Font::Font(const char *fntFilename) will not load the corresponding font bitmap texture on Android if using assets
• The package_copy_targets.cmake scripts on Windows does not copy DLLs
  • Should it be changed to copy the DLLs to more places? Not only the build directory but also in the Release and Debug directories
• Add a check for the Java package name to warn the user if the underscore is used
• Provide meaningful defaults for the data path configuration
• Use AllocConsole on Windows to open a console in Debug mode even when using WinMain
• Investigate the use of CMake's MAP_IMPORTED_CONFIG_CONFIG so that, for example, a project built in Release mode can correctly link to ncine_d.lib and ncine_main_d.lib
• Use ncline code to add colored logging output on all platforms