Alfresco 5.0.d Support

This release required changes in the plugin to support Alfresco Community Edition 5.0.d.

The plugin still uses java 7 internally so should in theory support alfresco 4.0+, but this has not been tested.
The plugin was tested on a alfresco server hosted on a linux machine.

New features:

1. The user can also export versions if they choose.
   2, The user has two options for revision numbering (default is the same format as the bulk importer, the alternative is a incrementing revision scheme)
2. Standard Alfresco Logging is used
3. Log Reporting has been implemented, showing you the progress of the Exporter
4. Summary information is presented on the Web Interface when an Export is completed

New Parameters available via URL interface:

1. exportVersions=true - will export any revisions found using the same revisioning scheme as the bulk importer tool
2. revisionHead=true - will place the revision number against the head revision file (the bulk importer scheme does not place a revision against the head revision), this is useful for scripting purposes.
3. useNodeCache=true - will force the exporter to use a cached list of all nodes to export. If the cache does not exist it will be created and the export will exit and require re-running. This feature is usefull when the number of nodes to export is high and the transaction cache is filled from generated the node list.