Use correct package name(s) when reporting version or calling function

[carterbox]

The tomopy-cli interface conflates tomopy and tomopy-cli. This is confusing users because they don't know that tomopy-cli=0.2 (the app) could be running atop any version of tomopy=1 (the library) since there is no minimum tomopy version specified by tomopy-cli. See tomopy/tomopy#266 (comment) for example.

Please report both the tomopy and tomopy-cli versions, when calling $ tomopy --version. Possibly consider changing the app call from tomopy to tomopy-cli.