Dget

Updated web app to Flask based open.
The new webapp will be hosted on google cloud.

**Full Changelog**: https://github.com/djdt/dget/compare/v0.11...v0.20

Added option for text output other than stdout.

**Full Changelog**: https://github.com/djdt/dget/compare/v0.10...v0.11

* Use D instead of [2H]
* Adduct search range increased to 1% of the total mass
* Fix number of states calculation
* an accumulative probability of 10% must be reached before the cutoff is calculated


**Full Changelog**: https://github.com/djdt/dget/compare/v0.9...v0.10

* Improve automatic adduct finding
* the adduct with the highest intensity in its m/z range is now selected
* if two adducts share the max, then the closet to the local base peak is chosen

**Full Changelog**: https://github.com/djdt/dget/compare/v0.8...v0.9

Remove negative probabilities before calculation.
Add number of states option, defaults to first two states < 0.5% D.
Add baseline subtraction.

**Full Changelog**: https://github.com/djdt/dget/compare/v0.7...v0.8

Cleanup and improve documentation.