* generic/gdbtk-main.c (main): Change name of intepreter to "insight".

    * generic/gdbtk-main.c (main): Change name of intepreter to "insight".
        * generic/gdbtk.h: Add ifdef wrappers.
        (gdbtk_init): Declare.
        (gdbtk_source_start_file): Declare.
        * generic/gdbtk.c (gdbtk_init): Export.
        Reomve init_ui_hook stuff.
        Do not add hooks here anymore (moved into interps).
        Do not muck with gdbk_stdout et al (moved into interps).
        (gdbtk_source_start_file): Code ripped out of gdbtk_init
        which deals with sourcing the main startup file.
        (gdbtk_init_1): Hack: New function.
        (argv0): Hack: New static global.
        (tk_init): Moved to gdbtk-interps.c.
        (gdbtk_resume): Likewise.
        (gdbtk_suspend): Likewise.
        (gdbtk_prompt_p): Likewise.
        (gdbtk_exec): Likewise.
        (gdbtk_command_loop): Likewise.
        (_initialize_gdbtk): Move interpreter stuff to gdbtk-interps.c.
        Hack: Add new init_ui_hook.
        * generic/gdbtk-interps.c: New file.