a) Refactored Crawl class so it accepts numFetchers as a parameter, this overrides
the default 1 map-task.
b) Added a try-catch in SolrDedup to avoid Crawl crashes when the documents don't have an id.
c) Added index-xmlnamespaces plugin to index name spaces from xml documents.
d) Added Eclipse files so Nutch and our plugins can be imported into Eclipse without much trouble.
e) Updated nutch-site to optimize documents fetching.