Extract System.Text namespace (#96)

***PUBLISH_RELEASE***

Author: josesimoes

source/nanoFramework.CoreLibrary/CoreLibrary.nfproj

@@ -164,11 +164,6 @@
     <Compile Include="System\String.cs" />
     <Compile Include="System\SystemException.cs" />
     <Compile Include="System\TargetFrameworkAttribute.cs" />
-    <Compile Include="System\Text\Decoder.cs" />
-    <Compile Include="System\Text\Encoding.cs" />
-    <Compile Include="System\Text\StringBuilder.cs" />
-    <Compile Include="System\Text\UTF8Decoder.cs" />
-    <Compile Include="System\Text\UTF8Encoding.cs" />
     <Compile Include="System\ThreadAttributes.cs" />
     <Compile Include="System\Threading\AutoResetEvent.cs" />
     <Compile Include="System\Threading\Interlocked.cs" />

source/nanoFramework.CoreLibrary/Friends.cs

@@ -8,3 +8,4 @@
 [assembly: System.Runtime.CompilerServices.InternalsVisibleTo("System.Math, PublicKey=00240000048000009400000006020000002400005253413100040000010001001120aa3e809b3da4f65e1b1f65c0a3a1bf6335c39860ca41acb3c48de278c6b63c5df38239ec1f2e32d58cb897c8c174a5f8e78a9c0b6087d3aef373d7d0f3d9be67700fc2a5a38de1fb71b5b6f6046d841ff35abee2e0b0840a6291a312be184eb311baff5fef0ff6895b9a5f2253aed32fb06b819134f6bb9d531488a87ea2")]
 [assembly: System.Runtime.CompilerServices.InternalsVisibleTo("nanoFramework.ResourceManager, PublicKey=00240000048000009400000006020000002400005253413100040000010001001120aa3e809b3da4f65e1b1f65c0a3a1bf6335c39860ca41acb3c48de278c6b63c5df38239ec1f2e32d58cb897c8c174a5f8e78a9c0b6087d3aef373d7d0f3d9be67700fc2a5a38de1fb71b5b6f6046d841ff35abee2e0b0840a6291a312be184eb311baff5fef0ff6895b9a5f2253aed32fb06b819134f6bb9d531488a87ea2")]
 [assembly: System.Runtime.CompilerServices.InternalsVisibleTo("nanoFramework.System.Collections, PublicKey=00240000048000009400000006020000002400005253413100040000010001001120aa3e809b3da4f65e1b1f65c0a3a1bf6335c39860ca41acb3c48de278c6b63c5df38239ec1f2e32d58cb897c8c174a5f8e78a9c0b6087d3aef373d7d0f3d9be67700fc2a5a38de1fb71b5b6f6046d841ff35abee2e0b0840a6291a312be184eb311baff5fef0ff6895b9a5f2253aed32fb06b819134f6bb9d531488a87ea2")]
+[assembly: System.Runtime.CompilerServices.InternalsVisibleTo("nanoFramework.System.Text, PublicKey=00240000048000009400000006020000002400005253413100040000010001001120aa3e809b3da4f65e1b1f65c0a3a1bf6335c39860ca41acb3c48de278c6b63c5df38239ec1f2e32d58cb897c8c174a5f8e78a9c0b6087d3aef373d7d0f3d9be67700fc2a5a38de1fb71b5b6f6046d841ff35abee2e0b0840a6291a312be184eb311baff5fef0ff6895b9a5f2253aed32fb06b819134f6bb9d531488a87ea2")]

source/nanoFramework.CoreLibrary/System/AssemblyInfo.cs

@@ -14,4 +14,4 @@
 [assembly: AssemblyProduct("nanoFramework mscorlib")]
 [assembly: AssemblyCopyright("Copyright © nanoFramework Contributors 2017")]
 
-[assembly: AssemblyNativeVersion("100.4.5.0")]
+[assembly: AssemblyNativeVersion("100.4.6.0")]

source/nanoFramework.CoreLibrary/System/String.cs

@@ -78,6 +78,11 @@ public extern char this[int index]
             get;
         }
 
+        internal char GetCharByIndex(int index)
+        {
+            return this[index];
+        }
+
         /// <summary>
         /// Copies the characters in this instance to a Unicode character array.
         /// </summary>