and wheelhouse to speed up build.

bootstrap and bootstrap-dev now don't check for library if requirements
file have not changed.

"make wheel" will be no-op if requirements file have not changed.

dropped usage of CI_BUILD=1 env variable, it is not used.

this is required for propery python3 unicode literal string support.

- W504 and W503 is just bad.
- E122, E129 programmer usually do the right thing himself.
  When this is not the case, these rules are not helpful.

upgraded default python-build-image version.

- allow set DOCKER_IMAGE_PREFIX and KUBECTL_CA_PATH via env variable
- bugfix: properly escape DOCKER_PASSWORD when running docker login
- bugfix: properly config cache for pip when running "make ci-build"
  it needs a dir at /.cache that the current user can write into, inside
  the "docker run" docker container.

make bootstrap-dev will call this when running unit test.

old version doesn't work on some python versions.

- no longer use install command to copy them at install time.
- this allow better handling of systemd service file.
  also allow user to run apt remove and purge.

user should update ./utils/build-deb and deb-scripts if systemd service
file is used.

also dropped support for upstart. upstart is irrelevant now.

- pep8 ignore W503 instead of W504.

notifempty    don't rotate if log file is empty
compress      compress rotated file
delaycompress compress on next rotation cycle

these allow author to build dist and upload dist to pypi.org

setup.py uses GPLv3+ by default, was GPLv2+

use compatible version (~=) for all dependencies there.

restrict some pkg to versions that does support python2.7, latest
version only support for python3.4+.

previously it was trying to call jenkins api, which I haven't used for
years. replaced it with an empty shell script with some comments.

add Makefile for gocd integration

- use wildcard instead of shell ls
- use id -u without user name. defaults to current user.

when install from deb that contains wheelhouse, do not touch network, do not
read user's pip configuration, which may include extra find-links option,
which in turn result in network requests.

After adding --isolated option, "make bootstrap" runs totally offline.

- support reading configs from environment variable.
  all config key can be configured by env variable.
  This feature is introduced in wells 1.4.0.
- add another configuration file position /etc/{{name}}/{{name}}.conf
  to allow easier volume mount in kubernetes.
- ci-build docker run use go user
- add host and port in app default configuration
- replace pep8 by pycodestyle

install default file mode is 755.

- added make ci-build and make deploy
- added app.yaml for k8s based deploy
- after-install.sh no longer run make install
- utils/build-deb grep add -q option
- Dockerfile.template apt use -qq option

run "make docker" to create a docker image.

docker image is based on debian stretch image and just install the deb
file. This doesn't change the dev workflow. Your venv, pip still work as
before.

let Makefile, setup.py, fabfile use version from that file.