[Feature] make conversion in context menu

[claudchan]

Hi,
Highlight text, right-click (open context menu), change case.

[pykong]

Second that. I doubt anyone could remember all the different key bindings.
It would be great to display in the style:
NameOfCase: PreviewOfWord

Like
PascalCase: MyConvertedWordPreview

[pykong]

I have created an early version of such improved CaseConversion plugin:
https://github.com/bfelder/CaseConversion/blob/master/case_conversion.py

Just use a test view with words like CaseConversionTest in it.
Mark them with caret and run:

view.run_command('toggle_case_converter')

A quick panel will be displayed offering all types of case conversions. The best part is that as you move through the quick_panel the selected word is changed on the fly. Very cool.
This patch is early stage and still has major hiccups.
(Note lower-, upper-, and title case conversions are also supported: #36)

@claudchan @jdc0589
Still, I'd like to have some feedback on it. Do you like it? What do you not like?