Close <pre> tag in 1.1 example code

- In the 1.1-check-solarium-and-ping.php example code, the <pre> tag is
  never closed after the var_dump. This fix closes the tag.
Added exculde functionality to stats component
Added tests for stats field excludes
Merge pull request #268 from juergen-vogel/master

Excludes on stats
Merge pull request #261 from davechez/fix-example-1.1-pre-tag

Close <pre> tag in 1.1 example code
Revert "Excludes on stats"
Merge pull request #274 from basdenooijer/revert-268-master

Revert "Excludes on stats"
Escape the phrases in a range query.

In order to prevent query injection, the helper methods should escape
the phrases.  Otherwise you could end up with something like
rangeQuery('1', '2] someOtherField:[* TO *') and leak information, etc.