Rename package from 'nw' to 'novelwriter' (#868)

* Rename nw folder to novelwriter
* Rename nw to novelwriter in auxiliary files
* Rename nw to novelwriter in main app source
* Rename nw to novelwriter in tests
* Make setup script for pdf docs less spammy

tests/test_tools/test_tools_projwizard.py

@@ -28,8 +28,8 @@ from tools import getGuiItem
 from PyQt5.QtCore import Qt
 from PyQt5.QtWidgets import QFileDialog, QWizard, QMessageBox
 
-from nw.enum import nwItemClass
-from nw.tools.projwizard import (
+from novelwriter.enum import nwItemClass
+from novelwriter.tools.projwizard import (
     GuiProjectWizard, ProjWizardIntroPage, ProjWizardFolderPage,
     ProjWizardPopulatePage, ProjWizardCustomPage, ProjWizardFinalPage
 )