dibs: I will implement exercise beer-song

Merge journey test scripts into one.

CI runs journey test

- otherwise this journey is testing not the latest copy of xjava, but
  what's at origin/master.
- add progress indicator.
- x-api can't serve binaries; must clean xjava of any build artifacts
  (e.g. .class files) before attempting to serve.

Signed-off-by: Bronwyn Perry-Huston <bronhuston@gmail.com>
Signed-off-by: Cen Ge <cge@corelogic.com>
Signed-off-by: John Ryan <jtigger@infosysengr.com>

Signed-off-by: Cen Ge <cge@corelogic.com>
Signed-off-by: Dan Neumann <dan@bestangle.com>
Signed-off-by: John Ryan <jtigger@infosysengr.com>

- golang 1.4 networking libs favor IPv4; x-api listening on IPv6
  localhost.
- need golang 1.5+

Signed-off-by: Bronwyn Perry-Huston <bronhuston@gmail.com>
Signed-off-by: Cen Ge <cge@corelogic.com>
Signed-off-by: John Ryan <jtigger@infosysengr.com>

Signed-off-by: Cen Ge <cge@corelogic.com>
Signed-off-by: Dan Neumann <dan@bestangle.com>
Signed-off-by: John Ryan <jtigger@infosysengr.com>

- clone x-api
- use proper version of ruby.

Signed-off-by: Bronwyn Perry-Huston <bronhuston@gmail.com>
Signed-off-by: Cen Ge <cge@corelogic.com>
Signed-off-by: John Ryan <jtigger@infosysengr.com>

Add canonical cases to test

Fix typo in test name

As I don't think the month of Map exists, I'm guessing this is meant to be May :)

Modify README to clarify instructions

Uppercase oxyphenbutazone

Update ABOUT.md

made the changes in the file.

Add new exercise simple linked list

Fix issue with jarfile

Add Java learning resources

Add new exercise acronym

- closes #89

- fixed a couple typos too.

With exercism/exercism.io@54e1df3, we can now gather exercises into a
subdirectory. By separating the language track files from the
configuration and management files, it is easier to read the project.

- move gradle config under "exercises" too as it would make a mess
  otherwise.

Fix broken image on installation instructions

Polish example linked-list exercise

Add nth-prime exercise

Tests and example implementation based on the ruby exercise.

Completes a task for https://github.com/exercism/xjava/issues/3.

Apply generics to the internals of Element to remove
needless casting.

Tighten Element scoping and move into Deque for succintness (sp).

Add the execise into the grade test suite.

Add linked-list exercise

The tests assume that the Deque class is implemented with generics.

The example implementation keeps track of a circular head Element.

Completes one task in https://github.com/exercism/xjava/issues/3.

- was: "problems", now: "tracks"
- help has been deprecated; update links.

(keeps AssertJ upgrade; reverts gradle config refactor)

Fixes #79, #80, #81.

This reverts commit 3fdc2d1b9c8749bee26140c359d93fc3a2681889.

Individual exercises must include a stand-alone build.grade, today.