Fix doc example: space missing between concatenated strings
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

Commits
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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