Add python package scaffold

Rakefile

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+task :default => [:install]
+
+desc "Remove/Delete build..."
+task :clean do
+  rm_rf %w(build dist)
+  rm_rf Dir.glob("*.egg-info")
+  puts "Build files are removed..."
+end
+
+desc "Install package for local development purpose"
+task :install => [:build] do
+  system "pip install -e ."
+end
+
+desc "Build package"
+task :build => [:clean] do
+  system "python setup.py sdist bdist_wheel"
+end
+
+namespace :upload do
+  desc "Upload package to main distro (release)"
+  task :main => [:build] do
+    puts "Uploading package to MAIN distro..."
+    system "twine upload --repository pypi dist/*"
+  end
+  desc "Upload package to test distro"
+  task :test => [:build] do
+    puts "Uploading package to TEST distro..."
+    system "twine upload --repository testpypi dist/*"
+  end
+end
+
+AVAILABLE_REVISIONS = ["major", "minor", "patch"]
+desc "Bump version"
+task :bump, [:revision] do |t, args|
+  args.with_defaults(revision: "patch")
+  abort "Please provide valid revision: #{AVAILABLE_REVISIONS.join(',')}" unless AVAILABLE_REVISIONS.include?(args.revision)
+  system "bumpversion #{args.revision}"
+end