orca CLI does not recognize directory; saves everything in current dir

[pbreheny]

The basic example given in the README does not work correctly if a filename with a path is specified:

orca graph '{ "data": [{"y": [1,2,1]}] }' -o tmp/fig.png

This creates 'fig.png' in the current directory, not in 'tmp'.

This is presumably related to #101, but just wanted to point out that it isn't an R/python API issue; it happens when you use orca directly as well.

Version info: 1.1.0 installed via npm.

[etpinard]

duplicate of #101