DOC: added title parameter
NF: scatter plot between underlay and overlay intensity
BF: make sure that identity transformation works (to show examples of poor alignment)
RF+BK: chance "-o" parameter from overwrite to output directory, to conform to other command line functionality
ENH: raise an error if any command line commands fail. Addresses https://github.com/PyMVPA/PyMVPA/issues/139
BF: do not crash if pprocess is not there and nproc=None
ENH+PY3: use // for integer division
PL: indent
BF: do not import hdf5 when external not present
PY3+RF: Improved Python3 compatibility
ENH: print error message with "%s", not "%r"
ENH+NF: improved and new __str__ functions
ENH+BF: proper conversion of linear indices to integer array
ENH: check for NaNs in coordinate equality comparison
ENH: more use of "%s" rather than "%r" in error messages
BF: type (forgot "x" in "xor")
Merge pull request #145 from nno/_tent/afni

minor improvements in prep-afni-surf while the whole destiny/future of this submodule is still unclear
BF: Fix wrong intentation
Merge branch 'master' into _tent/surfing
ENH: more consistent printing behaviour (with parentheses)