Add ASCII character set filter

tools/character-set-filters/ASCII.txt

@@ -0,0 +1,95 @@
+space
+exclam
+quotedbl
+numbersign
+dollar
+percent
+ampersand
+quotesingle
+parenleft
+parenright
+asterisk
+plus
+comma
+hyphen
+period
+slash
+zero
+one
+two
+three
+four
+five
+six
+seven
+eight
+nine
+colon
+semicolon
+less
+equal
+greater
+question
+at
+A
+B
+C
+D
+E
+F
+G
+H
+I
+J
+K
+L
+M
+N
+O
+P
+Q
+R
+S
+T
+U
+V
+W
+X
+Y
+Z
+bracketleft
+backslash
+bracketright
+asciicircum
+underscore
+grave
+a
+b
+c
+d
+e
+f
+g
+h
+i
+j
+k
+l
+m
+n
+o
+p
+q
+r
+s
+t
+u
+v
+w
+x
+y
+z
+braceleft
+bar
+braceright
+asciitilde