Merge pull request #31 from ipa-fxm-db/new_features

use rosloader for finding service_class
adapted test scripted to ros_loader; (removed .srv from module_name
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
Merge pull request #32 from ipa-fxm/new_features

Fix for nested service responses
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
fixed minor things..
Merge pull request #37 from ipa-fxm-db/experimental_branch

fixed minor things..
increaing max_msg_length - still hardcoded
nested service not MiRoR related anymore