prepared the 1.15.0 release
bumped version to 1.15.1-DEV
added an error message when trying to import an undefined block from a trait
bug #1288 added an error message when trying to import an undefined block from a trait (fabpot)

This PR was merged into the master branch.

Discussion
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added an error message when trying to import an undefined block from a trait

Commits
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a2c6db7 added an error message when trying to import an undefined block from a trait
Fix doc example: space missing between concatenated strings
Fixed rendering of ``-3``

The missing space between "``-3``" and "(this is just syntactic[...])" led to the ``-3`` being rendered wrong. The parser must've ignored the closing "``" when it was directly followed by a non-space character.
minor #1291 Fixed rendering of ``-3`` (ureimers)

This PR was merged into the master branch.

Discussion
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Fixed rendering of ``-3``

The missing space between "``-3``" and "(this is just syntactic[...])" led to the ``-3`` being rendered wrong. The parser must've ignored the closing "``" when it was directly followed by a non-space character.

Commits
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d8ea1b1 Fixed rendering of ``-3``
Add HHVM to build matrix
minor #1294 Add HHVM to build matrix (ptarjan)

This PR was squashed before being merged into the 1.15-dev branch (closes #1294).

Discussion
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Add HHVM to build matrix

Now that HHVM can run your project, lets keep it that way

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e03b05e Add HHVM to build matrix
fixed Travis config to allow HHVM to fail
Revert "merged branch javer/hhvm-array-traversable (PR #1192)"

This reverts commit 0d97eb95288c6f08d5c46e9aa5706f2341a34e29, reversing
changes made to 4fcaf0c5fc91435cf625c20c0ecbd29c4f8b25a1.

This change is not needed anymore as HHVM has been fixed as of 2.3.0.
minor #1290 [Docs] Fix example: space missing between concatenated strings (GromNaN)

This PR was merged into the 1.15-dev branch.

Discussion
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[Docs] Fix example: space missing between concatenated strings

The expression `'Hello'~'Fabien'` produces `'HelloFabien'`, not `'Hello Fabien'`. I've just added a space after `'Hello'`.

Commits
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d6e0357 Fix doc example: space missing between concatenated strings
Simple enhancement for easy overloading
minor #1284 Simple enhancement for easy overloading (arnapou)

This PR was squashed before being merged into the 1.15-dev branch (closes #1284).

Discussion
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Simple enhancement for easy overloading

More consistent algorithm which allow people to easily overload normalize method to their needs.

Commits
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87d4f08 Simple enhancement for easy overloading
fixed Filesystem::exists() to normalize the template name before checking the cache
Improved exception message for accessing object without ArrayAccess as array
fixed the conversion of the special '0000-00-00 00:00' date
bug #1311 fixed the conversion of the special '0000-00-00 00:00' date (fabpot)

This PR was merged into the 1.15-dev branch.

Discussion
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fixed the conversion of the special '0000-00-00 00:00' date

This PR reverts #1234 and add supports for PHP 5.5 is a simpler way. This also fixes #1241 and closes #1242.

Commits
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9b95570 fixed the conversion of the special '0000-00-00 00:00' date
made some minor tweaks to PHPUnit assertions
minor #1312 made some minor tweaks to PHPUnit assertions (fabpot)

This PR was merged into the 1.15-dev branch.

Discussion
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made some minor tweaks to PHPUnit assertions

Commits
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e5e2a01 made some minor tweaks to PHPUnit assertions