#51 Evaluate the `plantuml-java-args` defcustom at compile time

`defcustom`s are not executed at byte-compile time. Wrapping the
`defcustom` in an `eval-and-compile` form does the trick.

.travis.yml

@@ -9,5 +9,3 @@ before_install:
 script:
   - emacs --version
   - make test
-  - mkdir "$(cask package-directory)/../testing"
-  - emacs -q --batch --load test/resources/init.el

Makefile

@@ -18,6 +18,6 @@ install:
 
 clean:
 	rm -Rf .emacs.d
-	rm -Rf ${CASK_DIR}/../testing
+	rm -Rf .cask
 
 .PHONY:	all test unit ecukes install

plantuml-mode.el

@@ -77,8 +77,9 @@
 (defcustom plantuml-java-command "java"
   "The java command used to execute PlantUML.")
 
-(defcustom plantuml-java-args '("-Djava.awt.headless=true" "-jar")
-  "The parameters passed to `plantuml-java-command' when executing PlantUML.")
+(eval-and-compile
+  (defcustom plantuml-java-args '("-Djava.awt.headless=true" "-jar")
+    "The parameters passed to `plantuml-java-command' when executing PlantUML."))
 
 (defcustom plantuml-suppress-deprecation-warning t
   "To silence the deprecation warning when `puml-mode' is found upon loading.")