Update README.md

README.md

@@ -1,4 +1,29 @@
 [![Build Status](https://travis-ci.com/TheLartians/CPM.svg?branch=master)](https://travis-ci.com/TheLartians/CPM)
 
 # CPM
-Simple Cmake + git based package management
+
+CPM is a very simple package manager written in Cmake. It is extremely easy to use and drastically simplifies the inclusion of other Cmake-based projects from github.
+
+# Usage
+
+To add a new dependency to your project simply add the Projects target name, the git URL and a valid git tag or branch. 
+
+```cmake
+cmake_minimum_required(VERSION 3.5 FATAL_ERROR)
+
+project(MyParser)
+
+# add dependencies
+include(${CMAKE_CURRENT_SOURCE_DIR}/cmake/CPM.cmake)
+
+CPMAddPackage(
+  NAME LarsParser
+  GIT_REPOSITORY https://github.com/TheLartians/Parser.git
+  VERSION 1.2
+)
+
+# add executable
+set (CMAKE_CXX_STANDARD 17)
+add_executable(my-parser my-parser.cpp)
+target_link_libraries(cpm-test LarsParser)
+```