Huawei-lte-api

Fixes
* Update supported Python versions >=3.4 (scop )
* Fixes issue where login crashed on SessionError when login information was passed directly in URL (Salamek)
* Fixes issue where some devices (B535-232...) failed to parse XML with type attribute enabled (larsvinc)
* Fixes incorrectly implemented sms.delete_sms (Steve-Temple)

Enhancements
* Added method to clear system log (scop )

Fixes
* 52 Fixes crash with some LTE routers returning unexpected data in `wlan/host-list` call (scop)

Enhancements
* Added pin entry function to unlock SIM (by blazejpawlak)

Enhancements
* Try detect and wrap unsupported method redirects to "no support" exceptions (by scop)
* Added bunch of new methods and API groups [Cwmp, Lan, Led, Statistic, TimeRule] (by scop)

Fixes
* Return empty dict instead of None from all API methods (by scop)

Enhancements
* Add more network config, syslog, and voice methods (by scop)
* Auto-append trailing slash if URL doesn't end with one (by scop)
* Remove authorized_call (This was no longer a good idea, because authorization requirement differs by modem type and firmware version) (by scop)