Add Tunisian layout

It is a copy of the 'arab_pc' layout with arabic digits.
Also, fix the default layout for arabic.

res/xml/arab_pc_tn.xml

@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="utf-8"?>
+<keyboard name="Tunisian" script="arabic">
+  <row>
+    <key key0="ض" key1="&#1614;" key2="1" key3="`" key4="esc"/>
+    <key key0="ص" key1="&#1611;" key2="2" key3="\@"/>
+    <key key0="ث" key1="&#1615;" key2="3" key3="\#" key4="loc €"/>
+    <key key0="ق" key1="&#1612;" key2="4" key3="$" key4="loc £"/>
+    <key key0="ف" key1="&#1604;&#1573;" key2="5" key3="%"/>
+    <key key0="غ" key1="&#1573;" key2="6" key3="^"/>
+    <key key0="ع" key1="&#8216;" key2="7" key3="&amp;"/>
+    <key key0="ه" key1="&#0247;" key2="8" key3="*"/>
+    <key key0="خ" key1="&#0215;" key2="9" key3="("/>
+    <key key0="ح" key1="&#1563;" key2="0" key3=")"/>
+    <key key0="ج" key1="&gt;" key2="-" key3="_" key4="f11_placeholder"/>
+    <key key0="د" key1="&lt;" key2="=" key3="ذ" key4="f12_placeholder"/>
+    <!-- <key key0="ذ" key1="&#1617;" key3="\\" key4="|"/> -->
+  </row>
+  <row>
+    <key shift="0.5" key0="ش" key1="&#1616;" key4="tab"/>
+    <key key0="س" key1="&#1613;"/>
+    <key key0="ي" key1="["/>
+    <key key0="ب" key1="]"/>
+    <key key0="ل" key1="&#1604;&#1571;"/>
+    <key key0="ا" key1="أ"/>
+    <key key0="ت" key1="ـ"/>
+    <key key0="ن" key1="&#1548;"/>
+    <key key0="م" key1="/"/>
+    <key key0="ك" key1=":"/>
+    <key key0="ط" key1="&quot;"/>
+  </row>
+  <row>
+    <key shift="0.5" key0="ئ" key1="~"/>
+    <key key0="ء" key1="&#1618;"/>
+    <key key0="ؤ" key1="{"/>
+    <key key0="ر" key1="}"/>
+    <key key0="لا" key1="&#1604;&#1570;"/>
+    <key key0="ى" key1="&#1570;"/>
+    <key key0="ة" key1="&#8217;"/>
+    <key key0="و" key1=","/>
+    <key key0="ز" key1="."/>
+    <key key0="ظ" key1="&#1567;"/>
+    <key width="1.5" key0="backspace" key2="delete"/>
+  </row>
+</keyboard>

res/xml/method.xml

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <input-method xmlns:android="http://schemas.android.com/apk/res/android" android:settingsActivity="juloo.keyboard2.SettingsActivity" android:supportsSwitchingToNextInputMethod="true">
-  <subtype android:label="%s" android:languageTag="ar" android:imeSubtypeLocale="ar" android:imeSubtypeMode="keyboard" android:isAsciiCapable="true" android:imeSubtypeExtraValue="script=arabic,default_layout=arab_ibm"/>
+  <subtype android:label="%s" android:languageTag="ar" android:imeSubtypeLocale="ar" android:imeSubtypeMode="keyboard" android:isAsciiCapable="true" android:imeSubtypeExtraValue="script=arabic,default_layout=arab_pc"/>
+  <subtype android:label="%s" android:languageTag="ar" android:imeSubtypeLocale="ar_TN" android:imeSubtypeMode="keyboard" android:isAsciiCapable="true" android:imeSubtypeExtraValue="script=arabic,default_layout=arab_pc_tn"/>
   <subtype android:label="%s" android:languageTag="ay" android:imeSubtypeLocale="ay_AM" android:imeSubtypeMode="keyboard" android:isAsciiCapable="true" android:imeSubtypeExtraValue="script=armenian,default_layout=armenian_ph_am"/>
   <subtype android:label="%s" android:languageTag="be" android:imeSubtypeLocale="be_BY" android:imeSubtypeMode="keyboard" android:isAsciiCapable="true" android:imeSubtypeExtraValue="script=cyrillic,default_layout=cyrl_jcuken_ru,extra_keys=ґ|є|і|ї|ў"/>
   <subtype android:label="%s" android:languageTag="bg" android:imeSubtypeLocale="bg_BG" android:imeSubtypeMode="keyboard" android:isAsciiCapable="true" android:imeSubtypeExtraValue="script=cyrillic,default_layout=cyrl_ueishsht,extra_keys=€"/>