Improve makefile and readme

Makefile

@@ -4,10 +4,20 @@ LIBS = -lrlottie
 DEPS = lodepng.cpp
 TARGET = lfe
 
+ifeq ($(PREFIX),)
+    PREFIX := /usr/local
+endif
+
 all: $(TARGET)
 
 $(TARGET): $(TARGET).cpp
-	$(CC) $(CFLAGS) -o $(TARGET) $(DEPS) $(TARGET).cpp $(LIBS)
+    $(CC) $(CFLAGS) -o $(TARGET) $(DEPS) $(TARGET).cpp $(LIBS)
+
+install: $(TARGET)
+    install -m 644 $(TARGET) $(DESTDIR)$(PREFIX)/bin/
+
+uninstall:
+    rm -f $(DESTDIR)$(PREFIX)/bin/$(TARGET)
 
 clean:
-	$(RM) $(TARGET)
+    $(RM) $(TARGET)

README.md

@@ -6,21 +6,27 @@ Codebase is a mess. You've been warned.
 
 ## Deps
 
-- https://github.com/Samsung/rlottie -> Don't forget to do make install
+- https://github.com/Samsung/rlottie -> Don't forget to do make install (you'll likely want to go with the cmake route)
 - https://github.com/lvandeve/lodepng -> Already included here. Licensed Zlib.
 
-## How to build
+You'll also need g++.
+
+## How to build and install
 
 ```bash
 make
 ```
 
-You'll need g++.
+To install:
+
+```bash
+sudo make install
+```
 
 ## How to use
 
 ```bash
-./lfe mylottieanimation.json 420x420
+lfe mylottieanimation.json 420x420
 ```
 
 This will extract all frames as PNG files in the working directory.