Setup and use 'bumpversion' to manage release numbering + tagging

There is no need for anyone to do this manually!

Makefile

@@ -12,6 +12,13 @@ help:
 	@echo 'checkstyle: Run flake8'
 	@echo 'run: Run CharlesBOT locally'
 
+# Utility target for checking required parameters
+guard-%:
+	@if [ "$($*)" = '' ]; then \
+     echo "Missing required $* variable."; \
+     exit 1; \
+   fi;
+
 clean:
 	py3clean .
 	rm -f .coverage
@@ -41,3 +48,6 @@ test: install
 
 run:
 	PYTHONWARNINGS=default PYTHONASYNCIODEBUG=1 $(ENV)/bin/charlesbot
+
+release: guard-PART
+	$(ENV)/bin/bumpversion $(PART)

requirements-dev.txt

@@ -1,6 +1,7 @@
 -r requirements.txt
 
 asynctest==0.4.0
+bumpversion==0.5.3
 coverage==3.7.1
 flake8==2.4.1
 mccabe==0.3.1

setup.cfg

@@ -0,0 +1,6 @@
+[bumpversion]
+current_version = 0.4.0
+commit = True
+tag = True
+
+[bumpversion:file:setup.py]

setup.py

@@ -6,7 +6,7 @@
 
 setup(
     name='charlesbot',
-    version='0.4',
+    version='0.4.0',
     description='Slack Real Time Messaging robot written in Python 3!',
     long_description=long_description,
     author='Marvin Pinto',