Feature: Adds support for --version

Resolves: #24

Makefile.variables

@@ -5,8 +5,8 @@ export GIT_COMMIT = $(shell git rev-parse --short HEAD)
 export GIT_DIRTY = $(shell test -n "$$(git status --porcelain)" && echo "+CHANGES" || true)
 export GIT_DESCRIBE = $(shell git describe --tags --always)
 LDFLAGS :=
-# LDFLAGS += -X ${IMPORT_PATH}/${PROJECT}.Commit=${GIT_COMMIT}
-# LDFLAGS += -X ${IMPORT_PATH}/${PROJECT}.Version=${GIT_DESCRIBE}
+LDFLAGS += -X main.GitCommit=${GIT_COMMIT}${GIT_DIRTY}
+LDFLAGS += -X main.GitDescribe=${GIT_DESCRIBE}
 
 # Windows environment?
 CYG_CHECK := $(shell hash cygpath 2>/dev/null && echo 1)
@@ -28,6 +28,7 @@ endif
 DEV_IMAGE := ${PROJECT}_dev
 
 DOCKRUN := docker run --rm \
+	-e LDFLAGS="${LDFLAGS}" \
 	-v ${ROOT}/vendor:/go/src \
 	-v ${ROOT}:/${PROJECT}/src/${IMPORT_PATH} \
 	-w /${PROJECT}/src/${IMPORT_PATH} \