make matching case insensitive

lib/qwandry/flat_repository.rb

@@ -11,7 +11,7 @@ module Qwandry
     def scan(pattern)
       results = []
       all_paths.select do |path|
-        if File.fnmatch?(pattern, File.basename(path))
+        if File.fnmatch?(pattern, File.basename(path), File::FNM_CASEFOLD)
           results << package(File.basename(path), [path])
         end
       end

lib/qwandry/library_repository.rb

@@ -14,7 +14,7 @@ module Qwandry
       results = Hash.new{|h,k| h[k] = package(k)}
       all_paths.select do |path|
         basename = File.basename(path)
-        if File.fnmatch?(pattern, basename)
+        if File.fnmatch?(pattern, basename, File::FNM_CASEFOLD)
           # strip any file extension
           basename.sub! /\.\w+$/,'' unless File.directory?(path)
           results[basename].paths << path