move legend to up and fix y-axis inward if using different ymax

[xubeisi]

Welcome to deepTools GitHub repository! Please check the following regarding your pull request :

• [ no ] Does the PR contain new feature?
• [ yes ] Does the PR contain bugfix?
• [ no ] Does the PR contain documentation changes?
• [ no ] Does the PR contain changes to the galaxy wrapper?

two small Fixes, first move legend up so not overlap profiles. then move y-axis ticker inward so they won't look like buggy.

to

to