mnt/conda

Updates to new FSL build system (see the fsl/base> project).

• Dynamic linking against other FSL libraries
• Fix up header #include statements
• Do not assume external header files have included any namespace
• Various namespace disambiguations
• Option to statically link the CUDA runtime
• Use separate build directories for CPU / CUDA object files
• Use std::shared_ptr instead of boost::shared_ptr
• New eddy Python script, which calls eddy_cudaX.Y, or eddy_cpu, depending on which is installed