fix Android tablet detection

fix #136

src/bowser.js

@@ -306,9 +306,24 @@
 
     // device type extraction
     var osMajorVersion = osVersion.split('.')[0];
-    if (tablet || nexusTablet || iosdevice == 'ipad' || (android && (osMajorVersion == 3 || (osMajorVersion == 4 && !mobile))) || result.silk) {
+    if (
+         tablet
+      || nexusTablet
+      || iosdevice == 'ipad'
+      || (android && (osMajorVersion == 3 || (osMajorVersion >= 4 && !mobile)))
+      || result.silk
+    ) {
       result.tablet = t
-    } else if (mobile || iosdevice == 'iphone' || iosdevice == 'ipod' || android || nexusMobile || result.blackberry || result.webos || result.bada) {
+    } else if (
+         mobile
+      || iosdevice == 'iphone'
+      || iosdevice == 'ipod'
+      || android
+      || nexusMobile
+      || result.blackberry
+      || result.webos
+      || result.bada
+    ) {
       result.mobile = t
     }
 

src/useragents.js

@@ -141,6 +141,24 @@ module.exports.useragents = {
       , mobile: true
       , a: true
       }
+    , 'Mozilla/5.0 (Linux; Android 5.0.2; SM-T705 Build/LRX22G) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.105 Safari/537.36': {
+          chrome: true
+        , android: true
+        , version: '49.0'
+        , osversion: '5.0.2'
+        , blink: true
+        , a: true
+        , tablet: true
+      }
+    , 'Mozilla/5.0 (Linux; Android 6.0.99; Build/NPC91K) AppleWebKit/537.36(KHTML, like Gecko) Chrome/50.0.2661.86 Safari/537.36': {
+          chrome: true
+        , android: true
+        , tablet: true
+        , osversion: '6.0.99'
+        , version: '50.0'
+        , blink: true
+        , a: true
+      }
     }
   , 'Amazon Silk': {
       'Mozilla/5.0 (Linux; U; Android 4.0.3; en-us; KFTT Build/IML74K) AppleWebKit/535.19 (KHTML, like Gecko) Silk/3.4 Mobile Safari/535.19 Silk-Accelerated=true': {