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
added Exception for case that get a MutableVerticalTable that does not consist of PointerCalculators as input
Clean up PlanOperation header/constructor
Merge pull request #129 from bastih/feature/improve_planop

PlanOperation improvements
Remove byte_width and align_size from Table
Merge pull request #132 from bastih/feature/remove_stuff

Spring cleaning the Table interface
Fix ccache usage
Use fclose on opened files

Properly use fclose on opened files and stop eating up file descriptors.
Improve gtest bench

Use hardware counters in warmup runs, too.
Clean up PapiTracer
Merge pull request #133 from bastih/master

A bunch of fixes and improvements
Remove unused PapiTracer header
Tiny improvements on PapiTracer

Reduce handle template to one function.

Move around some state bits.
Silence LLVM warning on operator precedence