Parse URL query parameters to prepopulate subparser and script parameters

[Lioscro]

Support prepopulating script parameters by parsing URL query parameters. This is useful in generating Wooey URLs for user-facing scripts to minimize user error in filling out info that the component generating the URL may already know about.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (d2f65d3) 77.33% compared to head (469c136) 77.63%.

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #395 +/- ## ========================================== + Coverage 77.33% 77.63% +0.29% ========================================== Files 143 143 Lines 5022 5070 +48 Branches 666 668 +2 ========================================== + Hits 3884 3936 +52 + Misses 989 988 -1 + Partials 149 146 -3 ``` | [Flag](https://app.codecov.io/gh/wooey/Wooey/pull/395/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=wooey) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/wooey/Wooey/pull/395/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=wooey) | `77.57% <100.00%> (+0.29%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=wooey#carryforward-flags-in-the-pull-request-comment) to find out more.

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[Lioscro]

@Chris7 should we also update the docs on how this works?

[Chris7]

This is awesome. Docs would be great. I generally build them locally in docs with make docs and you can check the output in build