Merge pull request #22 from mgcam/devel

fixes for the create_label callback
Merge pull request #24 from mgcam/devel

short signatures pick up the header of the compressed string - change to...
Merge pull request #26 from mgcam/devel

distinct plate purposes & exclude controls from signatures
Merge pull request #28 from mgcam/devel

do not overwrite existing plate purpose
Merge pull request #30 from mgcam/devel

explicit increment_purpose flag for create_label callback
empty callback for 'stamp' action
Merge pull request #33 from mgcam/stamping

empty callback for 'stamp' action
code for 1:1 and N:N stamping
fixed code for creating containers
target analyte update fixed
updating analytes fixed
step_url option added
print out step url
use placements uri to post stamped plates
Changes update
MANIFEST update; no need to retrieve target analytes xml
Merge pull request #35 from mgcam/stamping

step_url option for stamping
pull in wtsi/devel