added description and usage example

README.md

@@ -11,3 +11,62 @@ This lib include include next modules:
 * Global - This module contains other global functions.
 
 
+## Build
+
+
+ * git clone https://github.com/QuasarApp/QuasarAppLib.git
+ * git submodule update --init --recursive
+ * cd QuasarAppLib
+ * cmake -DCMAKE_PREFIX_PATH=Yuor/Qt/Dir/Path .  
+ * make -j8
+ * make test #(for testing)
+
+## Include
+
+#### The cmake build do not required Qt libraries. 
+ 
+ * cd yourRepo
+ * git submodule add https://github.com/QuasarApp/QuasarAppLib.git # add the repository of QtBigInt into your repo like submodule
+ * git submodule update --init --recursive
+ * Include in your CMakeLists.txt file the main CMakeLists.txt file of QuasarAppLib library
+  >> add_subdirectory(QuasarAppLib)
+ * Rebuild yuor project
+
+``` cmake
+add_subdirectory(QuasarAppLib)
+target_link_libraries(MyBinary PUBLIC QtBigInt)
+```
+
+### Note 
+By Default QuasarAppLib makes as a static library. If you want to create a shared library just add the BUILD_SHARED_LIBS into your main CMakeLists.txt file.
+Example :
+
+``` cmake
+set(BUILD_SHARED_LIBS ON)
+add_subdirectory(QuasarAppLib)
+target_link_libraries(MyBinary PUBLIC QtBigInt)
+
+```
+
+# Usage
+Create objects of the BigInt class, and do what you got to do!
+
+``` cpp
+#include <quasarapp.h>
+
+    if (!QuasarAppUtils::Params::parseParams(argc, argv)) {
+        QuasarAppUtils::Params::log("Warning message", QuasarAppUtils::Warning);
+
+        Help::Charters help = {
+            {
+                "Main Section ", {
+                    {"-argument1",  "description of the argument1"},
+                    {"-argument2",  "description of the argument2"},
+                }
+            }
+        };
+
+        QuasarAppUtils::Help::print(help);
+        exit(0);
+    }
+```