Check for key in dict before getting it.
Merge pull request #45 from tadpol/specDescPublicFixing

Check for key in dict before getting it.
Proposing fix for the Python 3.4 breakage in using exoline as a library. Issue #20 will likely be fixed by this.
Merge pull request #46 from willcharlton/master

Fix for using Exoline as a library in Python 3.4
Merge branch 'specDescPublicFixing'
Merge commit 'f20e8140c30bea96663c249f84bb61c630308992'