Complete quoting for parameters of some CMake commands

[elfring]

Some parameters (like "${POSTGRESQL_INCLUDE_DIR}" and "${DOC_TARGET}") are passed to CMake commands in your build scripts without enclosing them by quotation marks. I see that these places will result in build difficulties if the contents of the used variables will contain special characters like semicolons.

I would recommend to apply advices from a wiki article.

[woodbri]

Thank you for this link. We'll do this in the next release.

[cvvergara]

@woodbri I started working on the CMake but could not finsh, so I will move this to next release

[cvvergara]

Work on progress, again couldnot finish, so for the moment, will detach from this milestone