added simple examples

examples/README.md

@@ -1,7 +1,14 @@
 Zstandard library : usage examples
 ==================================
 
+- [Simple compression](simple_compression.c)
+  Compress a single file.
+  Introduces usage of : `ZSTD_compress()`
+
+- [Simple decompression](simple_decompression.c)
+  Decompress a single file compressed by zstd.
+  Introduces usage of : `ZSTD_decompress()`
+
 - [Dictionary decompression](dictionary_decompression.c)
   Decompress multiple files using the same dictionary.
-  Compatible with Legacy modes.
   Introduces usage of : `ZSTD_createDDict()` and `ZSTD_decompress_usingDDict()`