Adds AppleX FEL Polarization

Adding mnemonics AppleX to get the AppleX polarization.

assigned to @lleguy

@carinanc we can clean up the merge next week.

added 25 commits

• 4e23a818...dc092fc6 - 20 commits from branch master
• 9deda5ed - avoid modifying integParams in get_peaks()
• 520f3c1a - Add peak extraction, save/load processed data functions
• 8a6a2242 - Add docstring to new functions
• b429dd79 - Add FEL polarization
• f2abc153 - Change name of polarization to AppleX

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changed title from Adds AppleX FEL Polarization to WIP: Adds AppleX FEL Polarization

added 1 commit

• 19b58409 - Update changelog

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added 1 commit

• 36a51392 - Back on master

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changed title from WIP: Adds AppleX FEL Polarization to Adds AppleX FEL Polarization

changed the description

added 1 commit

• 7b307c72 - Update changelog

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enabled an automatic merge when the pipeline for 7b307c72 succeeds

mentioned in commit 96099d1e

merged