Changes in Travis CI config: install pybitmessage and python_prctl

.travis.yml

@@ -1,6 +1,12 @@
 language: python
 python:
   - "2.7"
+addons:
+  apt:
+    packages:
+      - build-essential
+      - libcap-dev
 install:
   - pip install -r requirements.txt
-script: src/bitmessagemain.py -t
+  - python setup.py install
+script: pybitmessage -t

requirements.txt

@@ -1,3 +1 @@
-setuptools
+python_prctl
-numpy
-gi