added build instructions to readme

README.md

@@ -27,3 +27,8 @@ write by hand). "Where other build systems are high-level languages Ninja aims
 to be an assembler," according to Ninja's website. It can be thought of as a
 simpler, faster replacement for the classic `make`. It is used by default by
 Meson; CMake can also be configured to use ninja as a backend.
+
+## Building
+Build: `cargo build --release`
+Install: `sudo sh install.sh`
+Uninstall: `sudo sh uninstall.sh`

install.sh

@@ -1,2 +1 @@
-cargo build --release
-cp target/release/ngen ~/.local/bin
+cp target/release/ngen /usr/local/bin

uninstall.sh

@@ -0,0 +1 @@
+rm /usr/local/bin/ngen