the original hdlmake writes lines like
```
echo set_property "KEY" "VALUE" ...
```
to the Makefile.
Make will remove the quotes around `KEY` and `VALUE`, thus the generated tcl file will only contain
```
set_property KEY VALUE ...
```

Since we use single quotes around the corresponding line to preserve the leading blanks, the double quotes have to be removed
otherwise option values which contain blanks (e.g.
```
  [ "xpm_libraries", "{XPM_CDC XPM_FIFO XPM_MEMORY}" ],
```
)
have to be treated differently in project and non-project workflows.

This extension should behave as much as possible like the original
hdlmake, therefore the `write_cfgmem` command was removed from the
bitstream target.

Forgot to increment version number with previous commit....

Fixed a bug in (src/hdlmake_nonproj/tools/vivado.py).
PAR target was loading `PROJECT_post_synth` but checkpoint is named `PROJECT_synth`.

reworked gitlab ci to make use of gitlab's PyPi package registry.

removed deprecated `setup.py`
add gitlab ci