add more developer docs

Author: Allie Crevier

README.md

@@ -314,6 +314,7 @@ repository. Before committing, set the TOTP value in the cassette back to the va
 7. Add a detached signature (with the release key) for the source tarball.
 8. Submit the source tarball and signature via PR into this [repository](https://github.com/freedomofpress/securedrop-debian-packaging) along with the debian changelog addition. This tarball and changelog will be used by the package builder.
 
+
 ## Debugging
 
 To use `pdb`, add these lines:
@@ -326,3 +327,48 @@ Then you can use [`pdb` commands](https://docs.python.org/3/library/pdb.html#deb
 
 Logs can be found in the `{sdc-home}/logs`. If you are debugging a version of this application installed from a deb package in Qubes, you can debug issues by looking at the log file in `~/.securedrop_client/logs/client.log`. You can also add additional log lines in the running code in
 `/opt/venvs/securedrop-client/lib/python3.7/site-packages/securedrop_client/`.
+
+
+### Link against a debug version of PyQt5
+
+Work in progress...
+
+1. Build debug version of Qt 5
+
+Clone the Qt repo and build it from source following these instructions: https://wiki.qt.io/Building_Qt_5_from_Git#Getting_the_source_code. This defaults to creating a 'debug' build and installs the binaries in the current directory, avoiding the need for `make install`. 
+
+2. Build debug version of PyQt5 pointing it to our debug version of Qt
+
+   - pip install sip==5.2.0
+   - Download PyQt5 source (make sure the version is compatible with the version of Qt you just compiled)
+   - Set LD_LIBRARY_PATH and QTPATH to the debug version of Qt
+   - python configure.py --qml-debug --debug
+   - make && make install
+
+3. Install debug version of PyQt5 in the Client's virtual environment
+
+
+### Find/report a Qt bug
+
+1. Create a Qt account: https://login.qt.io/register
+2. Find or report a bug here: https://bugreports.qt.io
+
+
+## Using Qt Creator
+
+1. Download the Qt installer from: https://www.qt.io/download (be sure to select the download for open source users)
+
+2. Make the installer executable
+
+```
+chmod u+x qt-unified-linux-x64-3.2.2-online.run
+```
+
+3. Run the installer and select the which version of Qt you want installed
+
+Run `apt-cache show python3-pyqt5` in `sd-app` to figure out which version of PyQt to install
+
+5. Run Qt Creator
+
+Make sure to select a Python 3.7 interpreter in the project's build & run settings.
+>>>>>>> add more developer docs