Bug fix: avoid closing HTableInterface in case there is an scan operation. If so, the hTable will be close once the results are retrieved.
Changed scope of createHTable method for make it available to be overriden
Added possiblity to pass null into hTable.checkAndDelete in order to look for the existance of a column
Added boolean flag for closing the table in doWithtable
Improved get-values method make it possible to get by column name and qualifier
Merge pull request #3 from pobla/master

Fix issue: scan operation issue.