Changing wording to be more specific

I've asked on irc://irc.freenode.net/python and the proper term is `item access`, as in the methods `__getitem__`, etc.
Minor typo correction
Minor typo correction
Minor typo correction
Uneeded space
Minor typo and syntax correction
Minor typo correction
Minor typo correction
Changing docstring to reflect code
Merge pull request #502 from yuvallanger/patch-2

Minor typo correction
Merge pull request #504 from yuvallanger/patch-3

Changing docstring to reflect code
Prevent IPython from hijacking vanilla REPL
Fix PV slicer cursor
Fix test
Rename xw,yw to x,y since they are pixel coordinates, not world coordinates
Merge pull request #505 from astrofrog/fix-pv-slice-cursor

Fix PV slicer cursor
Remove runtests.py
Adding clarification to note
Merge pull request #503 from astrofrog/upgrade-runtests

Tests do not run using 'python setup.py test'
First attempt at integrating a Ginga viewer into Glue