Merge pull request #122 from benoitmangili/devel

changes file update
Gatekeeper tag plate service access refactored; well mapper module converted to a Moose role, input validation added; epp scripts print error to STDOUT before exiting with an error
use valid test data
simplification of and fixes for the gatekeeper request; POD fixes
well mapper: exclude superfluous check
Merge pull request #124 from mgcam/indexing

applying tag indices
fixing base_url errors
updating Changes file
Merge pull request #126 from benoitmangili/fixing_base_url

fixing base_url errors
bug fix in caching post requests
Merge remote-tracking branch 'wtsi/devel' into indexing
Merge pull request #128 from mgcam/indexing

bug fix in caching post requests
tag indices registration via reagents API
Merge pull request #129 from mgcam/indexing

tag indices registration via reagents API