Evaluate dif for inequalities only if arguments are reals

fixes #8288
Fix tests
Eval Abs(exp(x*I)) as 1 if x is real

- also rewrite re and im in terms of each other
Improve handing of Abs(b**e) when b is real
fixes Abs(x)**-3 bug
Add test for #8075

fixes #8075
Update secure token in Travis used to deploy the docs
Update command used to generate secure token for Travis
deploy_doc.sh: We need to set the upstream back to origin so that git pull works
We need to fetch origin so that it can see that the branch is there
Probably should hide the output of git fetch
modify major/minor detection of ellipse
make sure meijerint returns sympified result and 0 for equal limits
Merge pull request #8375 from skirpichev/8075-tests

Add test for #8075
reposition Pow and exp handling in Abs; add coverage test
Merge pull request #8290 from skirpichev/8288-fix

Evaluate dif for inequalities only if arguments are reals
Merge pull request #8379 from smichr/mi

make sure meijerint returns sympified result and 0 for equal limits
Merge pull request #9 from smichr/abs

reposition Pow and exp handling in Abs; add coverage test
Merge pull request #8359 from zanzibar7/eval_Abs_exp

Eval Abs(exp(x*I)) as 1 if x is real
Correct docstring of Pow for 0**negative; few formatting fixes