Replaced tabs with 4 spaces and other PEP8 fixes.

Conflicts:
	iview/fetch.py
Fixed tab/space issue in these 4 files as well.

Conflicts:
	iview/comm.py
	iview/config.py
Fixed tabs/spaces, resulted in keeping last line intact instead of split.
Clean up
Fix docstrings, which used to have embedded tabs
Finish purging tabs by replacing them with four spaces