Strange errors on windows if devon.properties contains mixed line endings

[hohwille]

OS specific line endings are a big pain. We tried to workaround issues we get when devon.properties have windows line-endings (CRLF).
Now if devon.properties for whatever reason have mixed line endings the property lines having CRLF at the end are causing wired errors on the console like (or even more strange garbage):

': not a valid identifier

Also this error happend:

bash: unset: `': not a valid identifier

We once had a pipe with tr -d '\r' included when reading the devon.properties but this was causing a strange bug:

• bash's "process substitution" for input file descriptors fails in msys #262
• 677f07d#diff-41581f7f0e28e499436e9cb46a007eba

So we could follow the approach of #394 with this commit:
9694feb

And not only append a trailing newline but also remove CR from any devon.properties automatically.