add: Initial README file

README.md

+# README
+
+## compiling
+ In order to compile rmrf you need to invoke
+ ´´´make all´´´
+ This requires the following:
+  * an POSIX compatible OS
+  * an C++17 compatible compiler
+  * libncurses-dev
+  * libopenssl
+ 
+ There is no ./configure nor make install yet.
\ No newline at end of file