cleaned up HashValueJoin and added test
added namespace to perf_regression/HashValueJoin.cpp
minor fix to make merge easier
added case to cast down MutableVerticalTable
Merge branch 'feature/mtv_op' of https://github.com/bastih/hyrise into feature/nested_radix_joins
Merge remote-tracking branch 'upstream/master' into feature/nested_radix_joins
patch for gcc 4.6
Meta Expressions

Defining expression for the TableScan using a single line of code (maybe 2)
Merge pull request #126 from hyrise/feature/macro_expressions

Meta Expressions
added Exception for case that get a MutableVerticalTable that does not consist of PointerCalculators as input
Remove g++ 4.6 support files and support claim
Remove ccache config
Move gccfilter variable to plugin
Merge pull request #128 from bastih/master

Makefile cleanups
Update doxyfiles
Clean up PlanOperation header/constructor
Add non-production build warning
Merge pull request #130 from bastih/master

Add warning for non-production build on server start
Merge pull request #129 from bastih/feature/improve_planop

PlanOperation improvements
Remove byte_width and align_size from Table