Improves purge method

Makes random access iterators Updates current iterators to be random access compatible. This allows to improve perfs on lower_bound/upper_bound algorithms

Merge branch 'feature/RenameVariable' into develop

Sets variable name

Calls rename dialog when clicking action in the menu

Adds method to get all variables from model This method will be used to generate forbidden names when renaming a variable (i.e. names of existing variables)

Create 'Rename action' in variable menu

Creates dialog to rename a variable

Merge branch 'feature/PurgeDataSeries' into develop

Adds vera exclusions