vst2_lglw_debug_plugin extracted, makefile made
vst2_debug_host temporarily using this debug plugin
vst2_debug_host Linux support for XWindows, _XEventProc
Temporary logger change to avoid crashes (needs investigating)

LGLW for Linux:
Include necessary X and GL headers
Temporary static log file and XErrorHandler for debugging
Many logging statements
loc_create_hidden_window implemented and working
loc_destroy_hidden_window implemented and working
lglw_window_open implemented and working
lglw_window_resize implemented and untested
lglw_window_close implemented and working
lglw_window_show implemented and untested
lglw_window_hide implemented and untested
lglw_window_is_visible is implemented and untested
lglw_window_size_get is implemented and untested
lglw_redraw is implemented, but possible wrongly
lglw_glcontext_push implemented and working
lglw_glcontext_pop implemented and working
lglw_swap_buffers implemented and working
lglw_swap_interval_set implemented and untested