remove interactive portion of frisk

interactive search engine selection has been removed in favor of command
line arguments to select engines with command  completion.
Fix error in s:get_visual_selection()

'==' was accidentally replaced by '""' when the heading style was changed
Debug funcs to autoload, added g:frisk_loaded

Trying to have Debug functions in autoload, not sure if its working
right now. I also added the required variables, and logic to disable the
plugin.
Move debugging functions into proper autoload dir

Still not sure if debugging is going to work but here is another try
Replaced References of crunch with frisk

I've got crunch on my mind, so I guess I accidentally put it all over
frisk
Added Completion Engine back to source

Not sure why got deleted..
Fixed debug messages in EngCompletion()
Reorder EncodeSearch() in a more logical way
Fixed #11: can use either " or ' in searches

also started updating help
Fixed #10 Added custom engines

Added frisk#EngineAdd() to allow users to add a search engine
Add default engine function/ add engine function

The user can now set the default engine and the add their own custom
engines.
Fixed typo/ changed formatting.
Fiexes #9: if search term is an url, if so open it

Check if search terms being used is a url, if so open the url instead of
searching
Major refactor
Updated Demo Gifs in README
Update Readme
Update Readme and Doc with small changes
Merge branch 'master' into Dev
Change text capture mode

 - detects visual selection and allows searching for blocks of text
 - also accepts normal ranges correctly