nested srv uses now message_conversion.extract_values
using float64 instead of std_msgs/Float64 lets scripts run fine.. ; next: fix with using std_msgs/Float64 --> need nested data field
snapshot for branch to show to genpy devs
merging fix for nested and custom service- and response-types
added singleton for request-list; allows provider to send service response without specifying module and type, they get looked up when response is received via request_id
Merge pull request #34 from ipa-fxm-db/experimental_branch

service provider does not need to provide module and type within responses