Implementing ScriptPlan Operations for HYRISE

Adds the possibility to write plan operations in JavaScript instead of C++
for easier prototyping. To enable this feature see the documentation and
accompanying unit tests in src/bin/units_access/ops_script.cpp. Attention
this feature is still in beta.
Merge pull request #94 from hyrise/v8

Implementing ScriptPlan Operations for HYRISE
Formatting issues in Layouter
Fixing #91 - consitency for indices
Merge branch 'master' of github.com:hyrise/hyrise
Remove unnecessary access.h include
Streamline includes in units_access/helper.cpp
Streamline includes in units_layouter
Remove <taskscheduler.h include from QueryParser.h
Remove net.h
Remove layouter.h
Remove taskscheduler.h
Actually remove layouter.h file
Add missing lib and OCD on build order
Remove memory.h
Remove unused variable assignments from PerfRegressions
fix in CentralPriorityScheduler that allows threads to sleep
initial stab at improving concat many
merged master
Merge branch 'feature/improve_concat_many_pcs' of github.com:bastih/hyrise into feature/scheduler_refactoring