This PR removes the Python 3.4 tox task and updates references in the
code to Python 3.5+.
tox complains about Python 3.4, which is EOL after next month:
> py34 installed: DEPRECATION: Python 3.4 support has been deprecated. pip 19.1 will be the last one supporting it. Please upgrade your Python as Python 3.4 won't be maintained after March 2019 (cf PEP 429).
Competing static site generators integrate the functionality of regenerating
content and serving it into their main executable. In pelican this
functionality used to be in an external script `develop_server.sh` which
resides in the blog base directory. This has the disadvantage that changes in
pelican can break the `develop_server.sh` scripts which will not automatically
be upgraded together with pelican by package managers. Thus, pelican should
integrate this functionality into its main executable.
To this end, this commit removes `develop_server.sh` and adds three command
line options to the pelican executable:
* `-l/--listen` starts the HTTP server (`-s/--serve` was already taken)
* `-p/--port` specifies the port to listen at
* `-b/--bind` specifies the IP to bind to
`--listen` and `--autoreload` can be used together to achieve the same
effect that other static site generators offer: Serve files via HTTP
while at the same time auto-generating the content.
Since the `develop_server.sh` script was removed, pelican-quickstart looses the
`develop` option.
Since the `develop_server.sh` script was removed, the Makefile looses the
`stopserver` target and the `devserver` target is replaced by running `pelican
-l` in the foreground.
Since pelican now offers the `--listen` option, the fabfile uses that instead
of starting the socketserver itself.
The "Getting Started" docs became overly long and unwieldy over time.
This splits it into separate sections, including:
* Quickstart
* Installation
* Writing content
* Publish your site
