Remove dead code in utils.data
Remove utils.autoattr
Consolidate utils.pyfile into utils.openpy
Remove utils.io.nlprint
Inline trivial file_read() function
Remove unused raw_input_ext and raw_input_multi functions
Remove unused *grep functions
Remove more unused functions from utils.text
Remove unused utils.notification
Remove unused utils.growl
Remove unused utils.newserialized
Make ProcessHandler.sh a property
Merge pull request #2882 from takluyver/utils-cleanup

Utils cleanup.

This removes various unused code that was sitting in IPython.utils.

I checked that we don't use these functions and modules at present, but we may want to leave some of them for future use or for extension authors. For the first pass, I've been deliberately quite aggressive about removing things.