Install binary to shard/bin folder

Just a workaround before https://github.com/crystal-lang/shards/pull/126
becomes live.

Makefile

@@ -1,5 +1,6 @@
 CRYSTAL_BIN ?= $(shell which crystal)
 PREFIX ?= /usr/local
+SHARD_BIN ?= ../../bin
 
 build:
 	$(CRYSTAL_BIN) build --release --no-debug -o bin/ameba src/cli.cr $(CRFLAGS)
@@ -8,6 +9,9 @@ clean:
 install: build
 	mkdir -p $(PREFIX)/bin
 	cp ./bin/ameba $(PREFIX)/bin
+bin: build
+	mkdir -p $(SHARD_BIN)
+	cp ./bin/ameba $(SHARD_BIN)
 test: build
 	$(CRYSTAL_BIN) spec
 	./bin/ameba

README.md

@@ -37,7 +37,18 @@ development_dependencies:
     github: veelenga/ameba
 ```
 
-Compile and install `ameba` binary onto your system while running `crystal deps`.
+Build `bin/ameba` binary within your project directory while running `crystal deps`.
+
+You may want also use it on [Travis](travis-ci.org):
+
+```yaml
+language: crystal
+install:
+  - crystal deps
+script:
+  - crystal spec
+  - bin/ameba
+```
 
 ### OS X
 

shard.yml

@@ -7,7 +7,8 @@ authors:
   - Vitalii Elenhaupt <velenhaupt@gmail.com>
 
 scripts:
-  postinstall: make build
+  postinstall: make bin
 
+# https://github.com/crystal-lang/shards/pull/126
 executables:
   - ameba