Added a missing import of Exception to Set.
Implemented a missing case for splicing.

Occurrences of a splice operator in the contribution to a comprehension
were not supported, e.g., {*x | x <- [[1,2], [3,4]]}
Added missing import of Exception in ListRelation
Added missing import of Exception in Relation.
Added missing import of Exception to DateTime.
Added missing import of Exception to util/FileSystem
Added missing import of Exception to util/Webserver
Added missing import of Exception to Type.
Added missing import of Exception to util/Benchmark.
Added more missing imports of Exception.
Several fixes to make the typechecker happy.
Added missing imports for Message and Exception to Grammar.
Changed IllegalCharacter exception to IllegalArgument exception
Added missing case for translating regexps.
Merge branch 'master' of https://github.com/cwi-swat/rascal.git
Updated status of Rascal libraries that can be compiled (at 2/3)
Rewritten toLocation to avoid regular expression in argument list.
Various minor issues