Updated readme

README.md

@@ -1,5 +1,26 @@
 # Portable Foreign Function Interface for R7RS schemes
 
+An attempt to make basic foreign function interface that is supported on
+multiple R7RS Sceheme implementations.
+
+Pull requests to fix bugs and add more tests are welcome.
+
+## Goals
+
+- Support only R7RS implementations
+  - Needs to have cond-expand and library support atleast (propably much more)
+- Same interface on all implementations
+  - Some things that are procedures on one implementation are macros on other,
+  but they must behave the same
+
+## Non goals
+
+- To support all R7RS implementations
+- To have every possible FFI feature
+- Compiling of C code at any point
+  - That is no stubs, no C code generated by the library and so on
+
+
 For bugs you can use the
 [Bugs](https://codeberg.org/r7rs-pffi/pffi/projects/9101)
 
@@ -74,7 +95,7 @@ Types are given as symbols, for example 'int8 or 'pointer.
 
 ### Procedures or macros
 
-#### pffi-shared-object-auto-load object-name additional-paths
+#### pffi-shared-object-auto-load
 
 Arguments: