Update jquery.ime from upstream and a fix in default preferences

Default preferences are kept while loading from localstorage. It may
be empty first time. Handling that case.

Change-Id: If5780006120e401a4df1171146760692b8963363

lib/jquery.ime/rules/si/si-wijesekara.js

@@ -10,8 +10,8 @@
 		author: 'Junaid P V',
 		license: 'GPLv3',
 		version: '1.0',
-		contextLength: 2,
-		maxKeyLength: 0,
+		contextLength: 0,
+		maxKeyLength: 2,
 		patterns: [
 			['`', '\u0DCA\u200D\u0DBB'],
 			['~', '\u0DBB\u0DCA\u200D'],
@@ -43,7 +43,7 @@
 			['l', 'ක'],
 			[';', 'ත'],
 			['\'', '.'],
-			['z',  '\''],
+			['z', '\''],
 			['x', 'ං'],
 			['c', 'ජ'],
 			['v', 'ඩ'],