readme edited

README.md

@@ -1,2 +1,23 @@
 # minigrep
-A minimalistic grep with rust. 
+A minimalistic grep with rust.
+
+### To build:
+
+    cargo build
+    cargo test
+
+You'll find minigrep in `target/release/minigrep`
+
+### Usage:
+
+`minigrep <pattern> <filename> [case]`
+
+case is added if the search is case sensistive
+
+### Example:
+minigrep Ram file_to_match.txt case
+
+
+
+
+