D-Net

#1498 introducing major citations related refactoring including new generic direct citation matching moved to processing phase, introduced position field in all citations schemas and updated collapser taking position into account when merging citations details coming from 3 variuos sources: fuzzy citationmatching, direct citationmatching, references metadata

merging trunk changes with IIS-CDH-5.3.0 branch

#1212 updating taxomonies database, introducing acm taxonomy classification, introducing acm classes support in exporter module, updating integration tests

#1315 propagating confidenceLevel to DocumentToConceptIds. Updating PIG transformer script by introducing concept identifiers deduplication UDF function picking record with the highest confidence level, introducing unit and integration tests. Propagating changes in document to concepts exporter module.

#1329 adding affiliations field in ExtractedDocumentMetadata PMC schema. Metadata extraction code refactoring by extracting code responsible for building Affiliation avro records to AffiliationBuilder class and sharing it with pmc ingestion. Implementing affiliations ingestion functionality in PmcXmlHandler covered with unit tests. Adding affiliations field support in ingest pmc metadata transformer.

#1306 introducing dummy field in DocumentId schema required to overcome https://issues.apache.org/jira/browse/PIG-3358 issue. Handling dummy filed in transformer pig scripts when it is required. Should be reverted as soon as PIG-3358 issue is fixed

removing avro-maven-plugin versioning conflicting with ${iis.avro.version}

fixing parent version to 1.0.1-CDH-5.3.0-SNAPSHOT

fixing version to 1.0.1-CDH-5.3.0-SNAPSHOT

merging trunk changes with IIS-CDH-5.3.0 branch