Merge pull request #13 from liminsun/master

Data transfer to main function
rt inverse working inside sourcelab plugin
rt inverse operator
rt average helper
rt average
Fixed issue of absolute path. Now the simulation can be done from anywhere without being necessarily in the mne-cpp/bin directory. Only thing is that MNE_CPP environment variable must be set
using QCoreApplication::applicationDirPath()
Add the data block convert