Input module: first version

Buffer structure & standard input module
Modified input module
Global input wrapper

Global input wrapper at modules/input/input
Look in include/visound/modules/input/input.h for instructions on how to use it
input module usage in osc
input module usage in scan
Fixed errors on osc & scan
Fixes
Decimal increments for osc horizontal sensivity
Decimal horizontal scale for osc (fixed and working)
Fixed input shut
Fix 2 (forget input shut)
[osc] horizontal sensivity split into integer values (the digit & the power) to avoid float precision problem
Man page
The parse module understands the new -c / --channels switch

The parse module understands the new -c / --channels switch
for future channels integration in the others modules
Oscilloscope takes in account global channels number

Oscilloscope now takes in account global -c / --channels parameter
Updated man page
Updated SCAN for channels selection

mantis 71 & 65
M 65 : Scan mode with modifiable channels & colors

you can now set different channels count in scan and their respective
color mask.
Fixed man page error
Fixed parse help