[jbosstools-dev] README: Updates to parent pom, target platforms, and CI publishing process

[Nick Boldt]

Since AM3 is now released, it's time to upversion the jbt, devstudio,
central, and EA target platforms from AM3 to Final.

I've also moved parent pom to use Tycho 0.26.0 [0], which allows us to
use the latest TP validation [1]. Simply enabling this new validator
caught a problem w/ two different versions of the same atlassian
feature in jbt/devstudio vs. central. So, that's been fixed.

[0] http://wiki.eclipse.org/Tycho/Release_Notes/0.26
[1] https://issues.jboss.org/browse/JBIDE-22673

BUILD_ALIAS is now set to Final (or GA, for devstudio builds).

Therefore, builds such as jbosstools-openshift should fail if a
SNAPSHOT dependency is re-introduced [2]. Or if you use a SNAPSHOT
dependency, like in jbosstools-aerogear [3]

[2] https://issues.jboss.org/browse/JBIDE-22446
[3] https://issues.jboss.org/browse/JBIDE-22881

Finally, it should be noted that builds now use p2diff -mode=deep to
determine if there's any reason to publish new bits onto
download.jboss.org. Should you notice that your commits are not being
built & published in a timely manner, please let me know ASAP. See
also this issue [4].

[4] https://issues.jboss.org/browse/JBIDE-22968

-- 
Nick Boldt :: JBoss by Red Hat
Productization Lead :: JBoss Tools & Dev Studio
http://nick.divbyzero.com