Work around export limitations

[boenrobot]

Using any export command doesn't get the expected results. Using it with a file argument works, but then the problem becomes how to read the contents of the file ('/file print detail=""' misses the contents argument).

There has to be a way to get around this limitation, and extrapolate it into functions that can easily import and export stuff.

[boenrobot]

The latest version (1.0.0b4) includes Util::fileGetContents() which can fetch contents of a previously executed "export", which can now even be executed in a "/system script" environment easily.