Added some examples, fixed a typo

sdcard/3ds/ctruLua/examples/httpc/httpc.lua

@@ -0,0 +1,43 @@
+local ctr = require("ctr")
+local gfx = require("ctr.gfx")
+local hid = require("ctr.hid")
+local httpc = require("ctr.httpc")
+
+local err = 0
+local addr = "https://wtfismyip.com/text"
+local dls = 0
+
+local context = assert(httpc.context())
+
+assert(context:open(addr))
+assert(context:beginRequest())
+
+local data = assert(context:downloadData())
+
+while ctr.run() do
+  hid.read()
+  keys = hid.keys()
+  if keys.held.start then break end
+  if keys.down.b then
+    assert(context:open(addr))  
+    assert(context:beginRequest())
+    data = assert(context:downloadData())
+    dls = dls + 1
+  end
+  
+  gfx.startFrame(gfx.TOP)
+    gfx.text(0, 0, data)
+    gfx.text(0, 20, "Downloaded "..dls.." times.")
+  gfx.endFrame()
+  
+  gfx.startFrame(gfx.BOTTOM)
+  	gfx.text(2, 2, "HTTP Contexts example")
+  	gfx.text(2, 20, "The data is downloaded from '"..addr.."'.")
+  	gfx.text(2, 30, "Press [B] to redownload.")
+  gfx.endFrame()
+  
+  gfx.render()
+end
+
+
+context:close()