add license for 'charter' font

charter/LICENSE

@@ -0,0 +1,16 @@
+Charter license
+
+This is a copy of the Charter fonts which Bitstream
+contributed to the X consortium. This is the original
+notice included with the fonts:
+
+(c) Copyright 1989-1992, Bitstream Inc., Cambridge, MA.
+You are hereby granted permission under all Bitstream
+propriety rights to use, copy, modify, sublicense, sell,
+and redistribute the 4 Bitstream Charter (r) Type 1 outline
+fonts and the 4 Courier Type 1 outline fonts for any
+purpose and without restriction; provided, that this notice
+is left intact on all copies of such fonts and that Bitstream’s
+trademark is acknowledged as shown below on all unmodified
+copies of the 4 Charter Type 1 fonts. BITSTREAM CHARTER is a
+registered trademark of Bitstream Inc.