Added the option to return the index of selected sources
Added flow and fhigh as parameter to the bandpass
Updated help
Changed sign of 2D Green's function to be consistent with point source
Merge branch 'master' of https://github.com/sfstoolbox/sfs
Updated if gnuplot to new syntax
Worked on the bandpass settings for the imp wave fields
Merge branch 'master' of github.com:sfstoolbox/sfs

* 'master' of github.com:sfstoolbox/sfs:
  Changed sign of 2D Green's function to be consistent with point source
  Updated help
Merge branch 'driving_functions'

* driving_functions: (39 commits)
  Cleaned up the usage of conf.phase in the driving functions
  Updated all functions to use the new point_source_mono etc. functions
  Changed point_source etc. to point_source_mono etc.
  Added a option to specify the greens function directly for the wave_field_mono function
  Fixed invoking bandpass by adding conf input parameter
  Changed the bandpass handling. Now a config option exists
  Added missing stuff for last commit
  Fixed the time handling of the imp driving functions
  Uncommented a bandpass
  Added flow and fhigh as parameter to the bandpass
  Added the option to return the index of selected sources
  tested a new delay handling in the WFS driving function
  Fixed a typo in ir_point_source
  Setting a equal ratio for the axis in draw_loudspeakers
  Fixed two small bugs in the WFS 2.5D time domain
  Added missing xref to ir_wfs_25d
  Don't check for correct secondary source for wave_field_imp_3d
  Moved the WFS preequalization filter to the time domain folder
  Update dthe point and line source wave field to the new handling
  Changed the wave field function in the time domain to the new 3D case
  ...

Conflicts:
	SFS_general/bandpass.m
	SFS_time_domain/wave_field_imp_3d.m
	SFS_time_domain/wave_field_imp_nfchoa_25d.m
	SFS_time_domain/wave_field_imp_wfs_25d.m