implements 'defer'
implemented 'experimental' switch
bugfix: do not use unknown conditional symbols
fixes #1712
final version before removal
deprecated old locking effects
minor documentation improvements
got rid of old code that used to be required for bootstrapping
compiler\parser.nim

implemented arrow like operators
implemented arrow like operators
changed formating
fixes #1699
Merge branch 'devel' of https://github.com/Araq/Nimrod into devel