compatibility with pdo branch of sqlite plugin

these changes are untested with the master branch of the sqlite plugin
don't cache request filter in instruction cache
Merge pull request #61 from dom-mel/master

don't cache table request filter in instruction cache
Merge branch 'master' into devel

* master:
  don't cache request filter in instruction cache
added two more indexes

this improves select performance a lot
Merge branch 'master' into devel

* master:
  added two more indexes
Moved the replacement of placeholder from handle() to render().
Handle() must generate and store the sql, so _buildSQL restored in handle(). When url parameters are available this means excution of buildSQL twice in table syntax . Better then no sql at all in the other syntaxes.
Use correct table in cloud query
Merge pull request #65 from Klap-in/master

Placeholders cached - sql not cached - cloud query fixed
removed old, broken test and added new dummy test
added unit test for data entry syntax handle
added test for data entry syntax showData method
added helper tests (cleanData and column)
added test for helper->_addPrePostFixes
added test for helper->_resolveData
added test for helper->_formatData
added test for helper->_replacePlaceholdersInSQL
improved helper tests
added missing helper->_formatData cases
added test for helper->_parse_filter