Add scope operator
Add tests for scope operator
Small changes on scope operator
Fixes for GCC
Small changes on resource class
Merge pull request #31 from kirkshoop/scope

rebased Scope
added retry operator
Merge pull request #33 from jepickett/master

added retry operator
add retry tests
wrong type specified in group_by
wrong type for seed in scan
ensure that maybe type is decayed
a loop must prevent moves.
update tests to use on.next instead of on.on_next
update new retry tests
Merge pull request #34 from kirkshoop/cppnow

add retry tests, bug fixes, rename on.on_next to on.next in tests
allow conversions to dynamic
Merge pull request #35 from kirkshoop/cppcon

allow conversions to dynamic
add more badges using @sheilds_io
add appveyor CI for windows