Initial introduction of exceptions to requests.

[matejak]

No description provided.

[scrutinizer-notifier]

The inspection completed: 1 new issues, 11 updated code elements

[codecov-io]

Codecov Report

Merging #48 into master will decrease coverage by 2.18%.
The diff coverage is 64%.

@@            Coverage Diff             @@
##           master      #48      +/-   ##
==========================================
- Coverage   92.71%   90.52%   -2.19%     
==========================================
  Files          17       17              
  Lines         563      623      +60     
==========================================
+ Hits          522      564      +42     
- Misses         41       59      +18

Impacted Files	Coverage Δ
src/nextcloud/api_wrappers/apps.py	100% <100%> (ø)	⬆️
src/nextcloud/base.py	76% <60%> (-24%)	⬇️
src/nextcloud/api_wrappers/user_ldap.py	100% <0%> (ø)	⬆️

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[luffah]

Note : This PR don't solve #5.

Maybe the PR will benefit of filling the description (with API reference source) and maybe associating it to a specific issue report.