fix: #7 and add `-i` flag to sed cmd (#11)

* Fixes #7 and adds `-i` to sed cmd

* Removed build dep

* Update README.md

* improve sed cmd

Makefile

@@ -1,4 +1,5 @@
 PREFIX ?= /usr
+DESTDIR ?=
 BINDIR ?= $(PREFIX)/bin
 LIBDIR ?= $(PREFIX)/share/hilbish
 
@@ -6,17 +7,17 @@ build:
 	@go build
 
 install:
-	@install -v -d "$(BINDIR)/" && install -m 0755 -v hilbish "$(BINDIR)/hilbish"
-	@mkdir -p "$(LIBDIR)"
-	@cp libs preload.lua .hilbishrc.lua "$(LIBDIR)" -r
-	@echo /usr/bin/hilbish >> /etc/shells
+	@install -v -d "$(DESTDIR)$(BINDIR)/" && install -m 0755 -v hilbish "$(DESTDIR)$(BINDIR)/hilbish"
+	@mkdir -p "$(DESTDIR)$(LIBDIR)"
+	@cp libs preload.lua .hilbishrc.lua "$(DESTDIR)$(LIBDIR)" -r
+	@echo "$(DESTDIR)$(BINDIR)/hilbish" >> /etc/shells
 	@echo "Hilbish Installed"
 
 uninstall:
 	@rm -vrf \
-			"$(BINDIR)/hilbish" \
-			"$(LIBDIR)"
-	@sed '/\/usr\/bin\/hilbish/d' /etc/shells
+			"$(DESTDIR)$(BINDIR)/hilbish" \
+			"$(DESTDIR)$(LIBDIR)"
+	@sed -i '/hilbish/d' /etc/shells
 	@echo "Hilbish Uninstalled"
 
 clean:

README.md

@@ -22,7 +22,7 @@ cd Hilbish
 make build
 sudo make install
 # Or 
-sudo make
+sudo make all
 ```
 
 Alternativly, if you use Arch Linux, you can install Hilbish with an **(unofficial)** AUR package