Update var.rst

Added documentation for the @var tag.
Update var.rst

Applied suggestions.
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All document sections are complete for @var. Please review.
Add puppi and apache submodule
Add missing apache include
Add tests for Compiler/Linker/Linker
Add test for uncovered method in Compiler/Pass/Debug
Add test for not covered method in Compiler/Linker/Linker
Start with ElementsIndexBuilderTest
Removed installer
Added presentation mode to routing filter
Merge pull request #945 from ceeram/develop-testfest-compiler

Develop testfest compiler
Merge pull request #940 from gammamatrix/develop

Update var.rst
Merge branch 'develop' of github.com:phpDocumentor/phpDocumentor2 into release-2.0
Dear repository,

You missed a test for getInheritedConstants
Which caused me some annoyance
So i did my very best
To create you a pull request
with love from the testfest attendants
Merge pull request #947 from ceeram/develop-testfest-descriptor

Dear repository,
remove unused parameter
Methods, properties and constants were not inheriting correctly
Merge branch 'release-2.0' into develop
Merge pull request #948 from ceeram/develop

remove unused parameter