[Fluxus] export problems

[gabor papp]

i have encountered some problems when i tried to export frames using a 
recorded keypress file.

- the scratchpad zoom is jumping while zooming
- the blinking of the cursor is much faster

these seemed to be solved by using recorder's m_Delta instead of 
calculating it from a gettimeofday call in GLEditor.cpp.

the sound was also recorded during the performance, but the recording is 
much louder then it was on scene. i'm getting 1000 times larger values 
   on a (gh) call. is there a solution to solve this? i'm not sure if 
it's possible to postprocess the recording to decrease the volume by 
this much.

- the recorded key files are not cross platform, linux ones cannot be 
replayed on a mac, and vice versa. probably due to the different key codes.

gabor