64 bit

Here are my changes to date for the 64-bit linux changes. Still compiles and runs properly on 32-bit linux. Runs up to a point (menubar, tool palette, application browser, seems to halt somewhere in "loading plugins") on 64-bit linux mint and then gives a segfault at

Program received signal SIGSEGV, Segmentation fault.
0x000000000057dcbe in MCBitmapEffectBoxBlur::CalculateRows (this=0x69c4720, p_pass=0)
    at ./src/bitmapeffectblur.cpp:735
735					t_row_buffer[x] = t_pixel_ptr[x] >> 24;

so it's still a work in progress.

In order to get the engine to compile (still desktop only) I had to install the following libraries:
libxft-dev
libxcb-image0-dev (may be a red herring because it didn't help)
libxv-dev
Xinerama