Add setup.py files to make plugins installable

For example:

```
pip3 install "git+https://git.launchpad.net/~krytarik/ubuntu-bots/+git/ubuntu-bots#subdirectory=Bugreporter"
```

Bugreporter/setup.py

@@ -0,0 +1,10 @@
+from supybot.setup import plugin_setup
+
+plugin_setup(
+    'Bugreporter',
+    install_requires=[
+        'bs4',
+        'feedparser',
+        'requests',
+    ],
+)

Bugtracker/setup.py

@@ -0,0 +1,9 @@
+from supybot.setup import plugin_setup
+
+plugin_setup(
+    'Bugtracker',
+    install_requires=[
+        'launchpadlib',
+        'pysimplesoap',
+    ],
+)

Encyclopedia/setup.py

@@ -0,0 +1,5 @@
+from supybot.setup import plugin_setup
+
+plugin_setup(
+    'Encyclopedia',
+)

PackageInfo/setup.py

@@ -0,0 +1,5 @@
+from supybot.setup import plugin_setup
+
+plugin_setup(
+    'PackageInfo',
+)

Random/setup.py

@@ -0,0 +1,5 @@
+from supybot.setup import plugin_setup
+
+plugin_setup(
+    'Random',
+)