Switch to use Core submodule.
Font/vector handling changes for compatibility with Core library.
Core library changes. Build as a console application.

Depends on glew, freetype, no longer uses FTGL.
Updated configure script, Makefile, build instructions.

autogen.sh and configure improvements taken from Gource.
Added hint to delete src/core directory if submodule init fails.
Added boost CPPFLAGS.
Implemented fullscreen toggle and window resizing.
Tweaks to position slider appearance.
Core module display class changes.
Notes about resizing / full-screen toggle.
Fixed some compiler warnings.
Fixed specifying full screen resolution.
Summarizer component content is now sorted.
Added settings class.
Fixed paddle position when not using the default paddle.
Full screen mode now uses desktop resolution by default.
Removed 'random' start-position option.
Updated codeblocks project file.
Fixed bug where Windows file selector changes the working directory.
Display paddle tokens in multi-paddle modes.

(Some tweaks made to the original pull request to get it to apply).