Refactor opId, opId_r, and isCommutative into free functions
Remove Identifiers that are no longer referenced
Fix Issue 11955 - Aliased types not accepted in foreach over range of tuple

Run semantic on the type before attempting implicit conversions.
Merge pull request #3127 from yebblies/issue11955

Issue 11955 - Aliased types not accepted in foreach over range of tuple
Merge pull request #3124 from yebblies/deadid

[cleanup] Remove Identifiers that are no longer referenced
Merge pull request #3117 from yebblies/opId

[refactor] Refactor opId, opId_r, and isCommutative into free functions
add .travis.yml to suppress Travis-CI testing on master

- Need a .travis.yml file in every branch
- only enable testing for dmd-1.x
- http://docs.travis-ci.com/user/build-configuration/#White--or-blacklisting-branches
Merge pull request #3129 from MartinNowak/disableTravis

add .travis.yml to suppress Travis-CI testing on master