Pyros-setup

------------------
- Adding doc index. [alexv]
- Fixing typo on doc/conf.py. [alexv]
- Fixing doc conf.py for rtfm without catkin_pkg. [alexv]
- Adding example usage script. [alexv]
- Adding pipfile lock in ignore list (multi python version). [alexv]
- Adding lunar tests for travis (59) [AlexV]

* adding lunar tests for travis

* improved the case when we do not have distro installed, or when we want to use install_isolated space.
remove lunar tests, since docker is not available yet

* fixing distro install path to be absolute
- Cleaning up package description and dependencies... [AlexV]
- Dropping travis attempt for python3. unsupported by ROS. attempting to
improve pipfile to allow site packages access... [AlexV]
- Fixing setuptools dependency in travis venv. [AlexV]
- Attempting to install recent setuptools in travis. [AlexV]
- Fixing travis python versions depending on distro. [AlexV]
- Fixing travis command to create virtualenv from specific python.
[AlexV]
- Removing tox-travis requirement. We realistically cannot test this in
virtual env isolation, since it heavily depends on the system to
access ROS packages. [AlexV]
- Transitioning from requirements.txt to pipfile. [AlexV]
- Importing print function from __future__. fixing python in travis
venv. [AlexV]
- Adding melodic as priority distro when detecting. [AlexV]
- Rewriting print as function in error case. [AlexV]
- Adding melodic to travis tests. [AlexV]
- Adding more python versions for tox testing. [AlexV]
- Adding pipenv Pipfile for environment with direnv to make it implicit.
[AlexV]
- Pin twine to latest version 1.11.0 (63) [pyup.io bot]
- Now allowing update on dev-requirements. [AlexV]
- Trying to pin six dependency high enough, since we do not need to rely
on system debs. [AlexV]
- Adding pyup config. [AlexV]
- Pin wheel to latest version 0.30.0. [pyup-bot]
- Update gitchangelog from 2.5.1 to 3.0.3. [pyup-bot]
- Comment fixes. [AlexV]
- Added twine and wheel to dev-requirements. [AlexV]

------------------
- V0.2.1. [AlexV]
- Enforcing pyros_config >=0.2 requirement. [AlexV]
- Fixup to get it to work with namespace packages as well. added some
comments. [AlexV]

------------------
- V0.2.0. [AlexV]
- Fixing CI bugs... [AlexV]
- Getting rid of hackish module relay. new API allows much simpler code,
with similar usage. [AlexV]
- Cleaning up and fixing PYTHONPATH environment setup to match sys.path.
[AlexV]

------------------
- V0.1.6. [AlexV]
- Implemented readdsitedir and readdpackage, inspired from site.py.
[AlexV]
- Removing our pyros-setup.cfg from source since pyros_setup should not
be run directly from source. [AlexV]
- Bumping version number to denote a change. added class comment for
WrappedList. [AlexV]
- Now using site.addsitedir to parse .pth files correctly when adding
site-packages and dist-packages into sys.path. [AlexV]
- Update gitchangelog from 2.4.1 to 2.5.1. [pyup-bot]
- Improved README. [alexv]
- Pin gitchangelog to latest version 2.4.1. [pyup-bot]
- Adjusted release flow description. [alexv]

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- V0.1.5. [alexv]
- Now doing virtualenvwrapper setup in container at each step. [alexv]
- Now doing virtualenvwrapper setup inside container. [alexv]
- Checking if explicit virtualenv setup is actually needed. [alexv]
- Attempting travis docker build and enabling kinetic check. [alexv]
- Fixed ROS_ETC_DIR and ROS_PACKAGE_PATH setup. adding debug logs.
cosmetics. [alexv]
- Running release commands from setup.py using subprocess shell call.
[alexv]

------------------
- Updated changelog. [alexv]
- Fixing travis python checks. [alexv]
- Now checking exit status during release process. added gitchangelog
config, not logging merge anymore. [alexv]
- Commenting travis check breaking because of pytest bug with installed
tests. [alexv]
- Bumping pyros-config requirement. fixed release flow description.
[alexv]
- Tagging changelog. [alexv]
- V0.1.4. [alexv]
- Updating changelog and setup.py release flow comment. [alexv]
- Improved travis test to catch config file errors. [alexv]
- Refined release flow in setup.py comments. [alexv]
- Fixed quoting distro in generated config file. [alexv]