add forceUnicode option. see #158.

README.md

@@ -339,6 +339,8 @@ The screen on which every other node renders.
 - __sendFocus__ - Send focus events after mouse is enabled.
 - __warnings__ - Display warnings (such as the output not being a TTY, similar
   to ncurses).
+- __forceUnicode__ - Force blessed to use unicode even if it is not detected
+  via terminfo, env variables, or windows code page.
 
 ##### Properties:
 

lib/program.js

@@ -255,7 +255,8 @@ Program.prototype.setupTput = function() {
     padding: options.padding,
     extended: options.extended,
     printf: options.printf,
-    termcap: options.termcap
+    termcap: options.termcap,
+    forceUnicode: options.forceUnicode
   });
 
   if (tput.error) {

lib/tput.js

@@ -2019,6 +2019,10 @@ Tput.prototype.detectFeatures = function(info) {
 };
 
 Tput.prototype.detectUnicode = function() {
+  if (this.options.forceUnicode) {
+    return true;
+  }
+
   var LANG = process.env.LANG
     + ':' + process.env.LANGUAGE
     + ':' + process.env.LC_ALL

lib/widgets/screen.js

@@ -53,6 +53,7 @@ function Screen(options) {
       dump: options.dump,
       term: options.term,
       resizeTimeout: options.resizeTimeout,
+      forceUnicode: options.forceUnicode,
       tput: true,
       buffer: true,
       zero: true
@@ -62,6 +63,10 @@ function Screen(options) {
     this.program.useBuffer = true;
     this.program.zero = true;
     this.program.options.resizeTimeout = options.resizeTimeout;
+    if (options.forceUnicode) {
+      this.program.tput.features.unicode = true;
+      this.program.tput.unicode = true;
+    }
   }
 
   this.tput = this.program.tput;