Update dependency definitions

- Make cachetools a hard dependency - closes #648
- Mark unidecode as an optional dependency for Relay - #561

README.md

@@ -42,9 +42,10 @@ If you are a developer and want to help make PyLink more portable, patches are w
 
     * Setuptools (`pip3 install setuptools`)
     * PyYAML (`pip3 install pyyaml`)
+    * cachetools (`pip3 install cachetools`)
     * *For hashed password support*: Passlib >= 1.7.0 (`pip3 install passlib`)
-    * *For better PID file tracking (i.e. removing stale PID files after a crash)*: psutil (`pip3 install psutil`)
-    * *For the servprotect plugin*: cachetools (`pip3 install cachetools`)
+    * *For Unicode support in Relay*: unidecode (`pip3 install Unidecode`)
+    * *For extended PID file tracking (i.e. removing stale PID files after a crash)*: psutil (`pip3 install psutil`)
 
 2) Clone the repository: `git clone https://github.com/jlu5/PyLink && cd PyLink`
 

setup.py

@@ -82,12 +82,12 @@ setup(
     ],
 
     keywords='IRC services relay',
-    install_requires=['pyyaml'],
+    install_requires=['pyyaml', 'cachetools'],
 
     extras_require={
         'password-hashing': ['passlib>=1.7.0'],
         'cron-support': ['psutil'],
-        'servprotect': ['cachetools'],
+        'relay-unicode': ['unidecode'],
     },
 
     # Folders (packages of code)