SDK|Documentation: Compile .qch outside the normal apidoc dir

The apidoc dir is being shared as a Dropbox folder (available via
DEW), but in the case of .qch we are only interested in the final
product, not the produced .html and other files.

doomsday/.gitignore

@@ -8,3 +8,5 @@ myrelease
 doomsday.kdev4
 *.user
 config_user.pri
+apidoc-qch
+

doomsday/sdk-qch.doxy

@@ -1,13 +1,13 @@
 @INCLUDE = sdk.doxy
 
-OUTPUT_DIRECTORY        = apidoc/qch/
+OUTPUT_DIRECTORY        = apidoc-qch/
 
 # Also generate help files for Qt Creator
 GENERATE_QHP            = YES
 QCH_FILE                = "doomsday.qch"
 QHP_NAMESPACE           = "net.dengine.sdk.1140"
 QHP_VIRTUAL_FOLDER      = "doomsday-1.14.0"
-QHG_LOCATION            = "../../build/scripts/qhelp.py"
+QHG_LOCATION            = "../build/scripts/qhelp.py"
 
 # Dynamic HTML doesn't work inside Qt Creator
 HTML_DYNAMIC_SECTIONS   = NO
@@ -20,4 +20,4 @@ GENERATE_TREEVIEW       = NO
 # General cleanup
 HTML_STYLESHEET         = qhelp.css
 INCLUDED_BY_GRAPH       = NO
-HAVE_DOT                = NO
+HAVE_DOT                = NO