Fix resetting of context flags when using Compute (they used to leave reduceConstants and reduceConstantFunctions incorrectly set)
Add correct_ans_latex_string to values not to be inherited (fixes wrong display when a Computed calue is used in a perl expression)
Fix the ijk() method to honor the texStrings/normalStrings value, and also accept a 'string' or 'TeX' value as a parameter
Merge pull request #68 from dpvc/hotfix/2.8-mathobjects

Hotfix/2.8 mathobjects