Update ExtractLinks.java
Update UriMappingBuilder.java
Update UriMapping.java
Update ExtractLinks.java
add ArcRecordBase
Update ExtractLinks.java
Update ArcInputFormat.java
Update UriMapping.java
Update UriMappingBuilder.java
Update UriMappingBuilder.java
Update ExtractLinks.java
add dependency to pom.xml
Merge branch 'master' into hadoop