Run travis jobs in build matrix (parallel)

.travis.yml

@@ -1,25 +1,28 @@
 sudo: false
 dist: trusty
-language: c
+matrix:
-compiler:
+  include:
-    - gcc
+    - script: make yabar
-addons:
+      compiler: gcc
-  apt:
+      language: c
-    packages:
+      env: CPPFLAGS=-DOLD_LIBCONFIG
-      - libxcb-randr0-dev
+      addons:
-      - libconfig-dev
+        apt:
-      - libcairo2-dev
+          packages:
-      - libpango1.0-dev
+            - libxcb-randr0-dev
-      - libxcb-ewmh-dev
+            - libconfig-dev
-      - libxcb-icccm4-dev
+            - libcairo2-dev
-      - libasound2-dev
+            - libpango1.0-dev
-      - libiw-dev
+            - libxcb-ewmh-dev
-      - docbook-xml
+            - libxcb-icccm4-dev
-      - asciidoc
+            - libasound2-dev
-      - xsltproc
+            - libiw-dev
-before_install:
+    - script: make docs
-    - export CPPFLAGS=-DOLD_LIBCONFIG
+      language: generic
-script:
+      addons:
-  matrix:
+        apt:
-      - make yabar && make install
+          packages:
-      - make doc && make install
+            - docbook-xml
+            - asciidoc
+            - xsltproc
+            - libxml2-utils