Fixing xpath-filter pageUrlFilterRegex

Changing the regex filter xml attribute name from urlFilterRegex to
pageUrlFilterRegex to match the documentation.
Merge pull request #1 from Drewch/fix-filter-xpath-page-regex-filter

Fixing xpath-filter pageUrlFilterRegex
Allowing for proper separation of Properties

In the initial implementation, you could not have a property field with the same name as another property field in a different property list. It would incorrectly assume that the field should be put in twice. Adding an id to each property, and prepending each property field's name with the id separated by a delimiter allows for proper separation between the property lists.
Fixing Spelling mistake on Delimiter
Merge pull request #2 from Drewch/add-property-id

Adding property id
Indexing a custom value

Allow possibility to index a custom value for each time a property is used for a url.
merging else with the if
Merge pull request #3 from Drewch/add-custom-value

Indexing a custom value
Merge https://github.com/Drewch/nutch-plugins