Add support for partials and path segments for Handlebars.

This introduces support for some missing features to the Handlebars lexer:
Partials and path segments. Partials mostly appeared to work before, but the
`>` in `{{> ... }}` would appear as a syntax error, as could other
components of the partial. This change introduces support for:

* Standard partials: `{{> partialName}}`
* Partials with parameters: `{{> partialName varname="value"}}`
* Ddynamic partials: `{{> (partialFunc)}}`
* Ddynamic partials with lookups: `{{> (lookup ../path "partialName")}}`
* Partial blocks: `{{> @partial-block}}`
* Inline partials: `{{#*inline}}..{{/inline}}`

It also introduces support for path segments, which can reference content in
the current context or in a parent context. For instance, `this.name`,
`this/name`, `./name`, `../name`, `this/name`, etc. These are all now tracked
as variables.

1 files changed, 17 insertions, 0 deletions

diff --git a/tests/support.py b/tests/support.py
new file mode 100644
index 00000000..c66ac663
--- /dev/null
+++ b/tests/support.py
@@ -0,0 +1,17 @@
+# coding: utf-8
+"""
+Support for Pygments tests
+"""
+
+import os
+
+from nose import SkipTest
+
+
+def location(mod_name):
+    """
+    Return the file and directory that the code for *mod_name* is in.
+    """
+    source = mod_name.endswith("pyc") and mod_name[:-1] or mod_name
+    source = os.path.abspath(source)
+    return source, os.path.dirname(source)