travis (full)
test data repo
Iris citation added into user guide
Merge pull request #389 from munslowa/citation

Iris citation added into user guide
Copy button in docs.
review actions
sorted cdl dim declarations
usecase cdl chagnes
review actions
Merge pull request #392 from bblay/travis_full

Full data testing with travis.
add exponential
Merge pull request #359 from cpelley/math_exponential

add exponential to math
fixed converting reference times
Experimental cube concatenate.
Merge pull request #336 from bjlittle/merge_extensive

Cube concatenate.
Merge pull request #390 from cpelley/fixtimeconvert

Fixed reference time conversion.
Update to README.md to include Travis-CI build status.
Merge pull request #399 from bjlittle/build_status

Update to README.md to include Travis-CI build status.
Merge pull request #393 from pelson/code_copy

Copy button in docs.
corrected syntax for named tuple def