add Libraries section to README

README.md

@@ -16,6 +16,38 @@ Picrin is a lightweight scheme implementation intended to comply with full R7RS
 - advanced REPL support (multi-line input, etc)
 - tiny & portable library (all functions will be in `libpicrin.so`)
 
+## Libraries
+
+- `(scheme base)`
+- `(scheme write)`
+- `(scheme cxr)`
+- `(scheme file)`
+- `(scheme inexact)`
+- `(scheme time)`
+- `(scheme process-context)`
+- `(scheme load)`
+- `(picrin macro)`
+
+    - `define-macro`
+    - `gensym`
+
+        Old-fashioned macro facility.
+
+    - `make-syntactic-closure`
+    - `identifier?`
+    - `identifier=?`
+
+        Syntactic closures.
+
+    - `er-macro-transformer`
+    - `ir-macro-transformer`
+
+        Explicit renaming macro families.
+
+- `(srfi 1)`
+
+    List manipulation library.
+
 ## Compliance with R7RS
 
 | section | status | comments |