fixed a performance regression when matching Sets and Maps
merge with master - Merge branch 'significant-digits'
fixed the passing of quoted arguments

Conflicts:
	common/src/main/scala/org/specs2/main/Arguments.scala
	common/src/main/scala/org/specs2/text/Split.scala
	notes/2.4.7.markdown
merged with master: fixed compilation issues with TaskMatchers and ProcessMatchers
merged with master: added an Argument.split method to properly create Arguments from a String
added a sequence combinator to sequence a list of MatchResults
fixed the failing tests