[done] remove enum comments

[done]  add underscores __open, __close
[done]  vmalloc, kmalloc - in the library add functions to change from one to another - vmalloc not working
[to be discussed] channel range, remove if - use directly the enumerations ??? are You sure

[done] ADC_WRTD - don't extend, but use the ADC use ADC
instead of having the functions configure_parameter, use getattr when needed
[done/to be discussed] set buffer afetr changing the pre/post samples



[postponed] wrtd remove not implemented functions from libary - wait until Dimitris pushes the changes
[postponed] im the library add a branch with missing functions
[postponed] wrtd tests - if I have time at the end of the contract

