Simplify building documentation

Make it so that doxygen and sphinx-build can both be run from the repo
root. Also change the output folder to mirror the input folder name.

README.md

@@ -53,16 +53,13 @@ You may also need to set `BOOST_ROOT` if CMake cannot find Boost.
 
 The GUI's HTML file is automatically built when building the LOOT GUI binary, but it can also be built by running `node scripts/vulcanize.js` from the repository root.
 
-## Building The API Documentation
+## Building The Documentation
 
-The API documentation is built using [Doxygen](http://www.stack.nl/~dimitri/doxygen/), [Breathe](https://breathe.readthedocs.io/en/latest/) and [Sphinx](http://www.sphinx-doc.org/en/stable/). On Windows, install Doxygen and [Python](https://www.python.org) 2.7, add Doxygen's binary path, `C:\Python27` and `C:\Python27\Scripts` (or wherever you installed Python to) to your `%PATH%`, then:
+The documentation is built using [Doxygen](http://www.stack.nl/~dimitri/doxygen/), [Breathe](https://breathe.readthedocs.io/en/latest/) and [Sphinx](http://www.sphinx-doc.org/en/stable/). Install them (Breathe and Sphinx support Python 2 and 3) and make sure they're accessible from your `PATH`, then:
 
 ```
-python -m pip install breathe sphinx
-cd docs/api
-doxygen
-cd ../..
-sphinx-build -b html docs build/documentation/sphinx
+doxygen docs/api/Doxyfile
+sphinx-build -b html docs build/docs/sphinx
 ```
 
 ## Packaging Releases

docs/api/Doxyfile

@@ -58,7 +58,7 @@ PROJECT_LOGO           = C:/Users/Oliver/Documents/GitHub/LOOT/loot/resources/ic
 # entered, it will be relative to the location where doxygen was started. If
 # left blank the current directory will be used.
 
-OUTPUT_DIRECTORY       = ../../build/documentation
+OUTPUT_DIRECTORY       = build/docs
 
 # If the CREATE_SUBDIRS tag is set to YES then doxygen will create 4096 sub-
 # directories (in 2 levels) under the output directory of each output format and
@@ -781,7 +781,7 @@ WARN_LOGFILE           =
 # spaces. See also FILE_PATTERNS and EXTENSION_MAPPING
 # Note: If this tag is empty the current directory is searched.
 
-INPUT                  = ../../include/loot
+INPUT                  = include/loot
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses

docs/conf.py

@@ -25,7 +25,7 @@ import subprocess, os
 read_the_docs_build = os.environ.get('READTHEDOCS', None) == 'True'
 
 if read_the_docs_build:
-    output_directory = '../build/documentation'
+    output_directory = '../build/docs'
     if not os.path.exists(output_directory):
         os.makedirs(output_directory)
 
@@ -353,7 +353,7 @@ texinfo_documents = [
 
 
 breathe_projects = {
-"loot":"../build/documentation/xml/",
+"loot":"../build/docs/xml/",
 }
 
 breathe_default_project = 'loot'