Nitpicky documentation

Re-enables nitpicky checks on the documentation. Fix errors caused by not having that flag ON.

added 3 commits

• f89c6b3d - 1 commit from branch master
• fc5a9547 - [doc] Re-enable nitpicky mode; Fix broken docs
• 39784b6a - [doc] Update conf.py for sphinx

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added 3 commits

• cd9e8d49 - 1 commit from branch master
• 514a9ebc - [doc] Re-enable nitpicky mode; Fix broken docs
• d72d65a6 - [doc] Update conf.py for sphinx

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added 1 commit

• 58fed03f - [conda] Doc-building depends on "requirements.txt" (copy it to doc dir)

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merged

mentioned in commit eaf478a4