Merge branch 'develop'

Releasing version 0.3.4
Merge branch 'develop'
Updated README.md file to the latest version (0.3.5)
Added acota-utils jar, contains all required resources embebed in a jar
Acota-core autoloads acota-utils when it detects the presence of this jar in the classpath
Modified CoreConfiguration in order to support the autoload behaviour

OpenNLPEnhancer now supports English Text
Acota Versions within */pom.xml uses project.version, this will avoid
false positives in travis.
Updated maven-compiler-plugin to the last version
Updated commons-io to its new artifact
Modified FeedbackMysqlDAOTest, right now sets the timezone to UTC
Modified FeedbackMysqlDAO, right now sets the timezone to the default java's timezone
Updated bash (.sh) scripts for testing and modifying the version of acota
Modified all packages, org.weso to es.weso as a result of Sonatype's requirements (Maven Central).
Moified pom.xml (Added SCM, Developers...) in order to get Acota in Maven Central Repository.
Updated ACOTA's dependacies and plugins
Feature Done, it is ready to merge with develop
Merge branch 'externalizable_conf' into develop