Add support for World of Warcraft .toc files

* Add language rule and heuristic for WoW Addon data

* Add test fixtures for the .toc extension

* Add grammar for syntax highlighting

* Define colour of WoW .toc files

* Refine heuristic to include a commonly-used keyword

* Check whitespace in WoW-token heuristic

* Include additional TeX keywords in .toc heuristic

* Update grammar submodules

* Cache license for WoW-toc grammar

* Reverting sourcepawn update

samples/World of Warcraft Addon Data/addon.toc

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+## Interface: 60200
+## Title: Vahevian Lotus Vane
+## Notes: "Critical Threat Range"
+## Version: 4.2
+Vahevia.xml
+Lotus_Vane.lua

samples/World of Warcraft Addon Data/lingua.toc

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+# Internationalisation example
+
+## Title: Test
+## Title-esES: Pruebas
+## Title-huHU: Próba
+## Notes: "Testing this shit"
+## Notes-esES: "Probando la mierda esta"
+## Notes-huHU: "Kipróbálom ezt a szart"
+
+Tests.xml
+Elk.lua

samples/World of Warcraft Addon Data/linguist.toc

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+# Addon manifest file
+
+## Interface: 60200
+## Title: Linguist
+## Notes: "Language savant"
+## RequiredDeps: charlockHolmes, escapeUtils, mimeTypes, rugged
+## LoadOnDemand: 1
+## Version: 4.9
+
+# This is a comment
+## SavedVariables: foo, bar
+## SavedVariablesPerCharacter: fewburt
+
+Languages.xml
+Heuristics.xml
+h-counter.lua
+ruby-isnt.lua
+
+#
+# It is possible for addons to query values of any tags with a "X-" prefix.
+# Some possibilities include:
+#
+## X-Date: "2016-04-28"
+## X-Website: "https://github.com/"