added selection cuts to AcqsSelecter (hard-coded)

- port the cut values to analysis file
bug fix: initial value of amplneglate

- set to "+"1 now, was -1
add util class for config file parsing

 Changes to be committed:
	new file:   include/util.h
	new file:   src/util.cc
bug fix in acquisition.cc

- conversion from ns to samples was hard-coded to "*10", now "/SampleInterval()"