41: Name clash if CheckRule Variable is named 'e' 

Also for CheckRule the name of the variable for the exception is
generated on the base of the rule's name.

Closes #41

Change-Id: Icd2ac5612ed735011735a464ea7679f4de26b947
Task-Url: https://github.com/LorenzoBettini/xsemantics/issues/issue/41
regenerated example code

Change-Id: I6beac0d08a5104cee3dfc0921ec3c9ab5ca75965
Task-Url: https://github.com/LorenzoBettini/xsemantics/issues/issue/41
44: generates previousFailure in the Java code

Change-Id: Ib1dbc7e3a5211f35537992be3cf406dac35d0088
Task-Url: https://github.com/LorenzoBettini/xsemantics/issues/issue/44
44: consider previousFailure in the type computation

Change-Id: Ie936c62ba320b3899447db3adc42c4addc8b1594
Task-Url: https://github.com/LorenzoBettini/xsemantics/issues/issue/44
44: other tests for previousFailure

Change-Id: Ida38f77acf97b67455484bf9f70611c0fd3ee3c3
Task-Url: https://github.com/LorenzoBettini/xsemantics/issues/issue/44
44: custom resource description strategy removed

Change-Id: I9c65dbd4142ac92e1f2c57fc5f6b1cc29a44bedc
Task-Url: https://github.com/LorenzoBettini/xsemantics/issues/issue/44
44: error message for var decl with name previousFailure

Change-Id: Ia102d2cb4fb9f1ccda849719b5f6d8af3ce08c6a
Task-Url: https://github.com/LorenzoBettini/xsemantics/issues/issue/44
44: name "previousFailure" is a constant in XsemanticsConstants

To avoid a useless cycle between generator and typesystem packages

Change-Id: I096a80b897e59e3adf9ba269b91b88fc092102e1
Task-Url: https://github.com/LorenzoBettini/xsemantics/issues/issue/44
44: test executing use of previousFailure

Change-Id: I105a2edd9abe3260316185ba5595cc97a14bc438
Task-Url: https://github.com/LorenzoBettini/xsemantics/issues/issue/44
44: incremented version and regenerated example code 

Change-Id: I88a354d21ca30520958c44916200a5b751bbe52c
Task-Url: https://github.com/LorenzoBettini/xsemantics/issues/issue/44
44: removed unused method

Change-Id: I316f43a94a13103b4e313d85c77e8bc44853dd2a
Task-Url: https://github.com/LorenzoBettini/xsemantics/issues/issue/44
Merge remote-tracking branch 'upstream/master' into maintenance-xtext-2.6
Added Travis file
Merge remote-tracking branch 'upstream/master' into maintenance-xtext-2.6
Use itemis nexus repo instead of fornax

Otherwise Travis seems to complain

Change-Id: I566422670a72634b12327d6c8da32ada2273a1ad
Task-Url: https://github.com/LorenzoBettini/xsemantics/issues/issue/44
-Djsse.enableSNIExtension=false

Attempt to avoid problems when building in Travis for the itemis nexus
repository

[ERROR] Internal error: java.lang.RuntimeException:
org.apache.maven.MavenExecutionException: Could not setup plugin
ClassRealm: Plugin org.fornax.toolsupport:fornax-oaw-m2-plugin:3.4.0 or
one of its dependencies could not be resolved: Failed to read artifact
descriptor for org.fornax.toolsupport:fornax-oaw-m2-plugin:jar:3.4.0:
Could not transfer artifact
org.fornax.toolsupport:fornax-oaw-m2-plugin:pom:3.4.0 from/to
fornax.plugin.repository
(https://projects.itemis.de/nexus/content/groups/public/):
java.lang.RuntimeException: Could not generate DH keypair: Prime size
must be multiple of 64, and can only range from 512 to 1024 (inclusive)

http://stackoverflow.com/questions/7615645/ssl-handshake-alert-unrecognized-name-error-since-upgrade-to-java-1-7-0

Change-Id: I3ba032a57acbde587868b03fb2494c4270254ff3
oraclejdk8 for Travis build

Attempt to avoid problems when building in Travis for the itemis nexus
repository

[ERROR] Internal error: java.lang.RuntimeException:
org.apache.maven.MavenExecutionException: Could not setup plugin
ClassRealm: Plugin org.fornax.toolsupport:fornax-oaw-m2-plugin:3.4.0 or
one of its dependencies could not be resolved: Failed to read artifact
descriptor for org.fornax.toolsupport:fornax-oaw-m2-plugin:jar:3.4.0:
Could not transfer artifact
org.fornax.toolsupport:fornax-oaw-m2-plugin:pom:3.4.0 from/to
fornax.plugin.repository
(https://projects.itemis.de/nexus/content/groups/public/):
java.lang.RuntimeException: Could not generate DH keypair: Prime size
must be multiple of 64, and can only range from 512 to 1024 (inclusive)

http://stackoverflow.com/questions/10687200/java-7-and-could-not-generate-dh-keypair#comment42160155_16687105

Change-Id: I2e18b375f1c73f462e201cddf341be7fd2298fb1
disable wagon.http.ssl for Travis build

Change-Id: I47194c62c451e923bec04bafb03a4c406be35db5
45: data field in ErrorInformation

Change-Id: Id57733714fa412d6773a00c18d0a282c6544740d
Task-Url: https://github.com/LorenzoBettini/xsemantics/issues/issue/45
45: Allow to store any "data" in an error specification 

Change-Id: I1ed4e659ddf0d8bd5498d2011a7a3d20443117d7
Task-Url: https://github.com/LorenzoBettini/xsemantics/issues/issue/45