feature #1209 added the starts with, ends with, and matches operators (fabpot)

This PR was merged into the master branch.

Discussion
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added the starts with, ends with, and matches operators

Adds three new operators:

 * `ends with`
 * `starts with`
 * `matches`

I've not added the `contains` operator as it would be equivalent with the existing `in` one.

TODO:

 * [x] add docs
 * [x] fix on PHP 5.2.

Commits
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b66181d added the starts with, ends with, and matches operators

diff --cc CHANGELOG
index 483f107,1c03184..2994052
--- 1/CHANGELOG
--- 2/CHANGELOG
+++ b/CHANGELOG
@@@ -1,6 -1,6 +1,7 @@@
  * 1.14.0 (2013-XX-XX)
  
 + * fixed usage of the html_attr escaping strategy to avoid double-escaping with the html strategy
+  * added new operators: ends with, starts with, and matches
   * fixed some compatibility issues with HHVM
   * added a way to add custom escaping strategies
   * fixed the C extension compilation on Windows