Document URHO3D_C++11 build option. Update default values of URHO3D_LUA & URHO3D_SAMPLES build options in the documentation.

Docs/GettingStarted.dox

@@ -94,7 +94,7 @@ A number of build options can be defined when invoking the build scripts or when
 |IOS                  |0|Configure project for targeting iOS platform (cmake_generic.sh and cmake-gui only)|
 |URHO3D_64BIT         |*|Enable 64-bit build, the default is set based on the native ABI of the chosen compiler toolchain|
 |URHO3D_ANGELSCRIPT   |1|Enable AngelScript scripting support|
-|URHO3D_LUA           |0|Enable Lua scripting support|
+|URHO3D_LUA           |1|Enable Lua scripting support|
 |URHO3D_LUAJIT        |0|Enable Lua scripting support using LuaJIT (check LuaJIT's CMakeLists.txt for more options)|
 |URHO3D_LUAJIT_AMALG  |0|Enable LuaJIT amalgamated build (LuaJIT only)|
 |URHO3D_SAFE_LUA      |0|Enable Lua C++ wrapper safety checks (Lua/LuaJIT only)|
@@ -103,7 +103,7 @@ A number of build options can be defined when invoking the build scripts or when
 |URHO3D_PHYSICS       |1|Enable Physics support|
 |URHO3D_NAVIGATION    |1|Enable Navigation support|
 |URHO3D_URHO2D        |1|Enable 2D rendering & physics support|
-|URHO3D_SAMPLES       |0|Build sample applications|
+|URHO3D_SAMPLES       |1|Build sample applications|
 |URHO3D_TOOLS         |1|Build tools (native and RPI only)|
 |URHO3D_EXTRAS        |0|Build extras (native and RPI only)|
 |URHO3D_DOCS          |0|Generate documentation as part of normal build (the 'doc' builtin target can be used to generate documentation regardless of this option's value)|
@@ -111,6 +111,7 @@ A number of build options can be defined when invoking the build scripts or when
 |URHO3D_PCH           |1|Enable PCH support|
 |URHO3D_DATABASE_ODBC |0|Enable Database support with ODBC, requires vendor-specific ODBC driver|
 |URHO3D_DATABASE_SQLITE|0|Enable Database support with SQLite embedded|
+|URHO3D_C++11         |0|Enable use of C++11 standard|
 |URHO3D_MMX           |0|Enable MMX instruction set (32-bit Linux platform only); the MMX is effectively enabled when 3DNow! or SSE is enabled; should only be used for older CPU with MMX support|
 |URHO3D_3DNOW         |0|Enable 3DNow! instruction set (Linux platform only); should only be used for older CPU with (legacy) 3DNow! support|
 |URHO3D_SSE           |*|Enable SSE/SSE2 instruction set (Web and Intel platforms only including Android on Intel Atom); default to true on Intel and false on Web platform; the effective SSE level could be higher, see also URHO3D_DEPLOYMENT_TARGET and CMAKE_OSX_DEPLOYMENT_TARGET build options|