[haskeline] #93: Add case-insensitive completion option

[haskeline]

#93: Add case-insensitive completion option
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Reporter:  cjs          |       Owner:            
    Type:  enhancement  |      Status:  new       
Priority:  minor        |   Milestone:            
 Version:  0.6          |    Keywords:  completion
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 Add a `completionCaseInsensitive` option for `~/.haskeline` that defaults
 to `False`. If set instead to `True`, asking to complete "fo" would match
 both "foo" and "Foo".

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Ticket URL: <http://trac.haskell.org/haskeline/ticket/93>
haskeline <http://example.org/>
My example project