add build requirements

Update pantalaimon to 0.9.2

full cross compile using clickable

add olm submodule

I made an oops

updated readme

pin python cryptography to 3.2.1

This is the last version of python cryptography that will cleanly
build on Ubuntu Touch 16.04. The 3.3 series depends on newer openssl and
the 3.4 series depends on Rust.

fix loglevel setting on save

selectedIndex doesn't actually change until after onDelegateClicked
completes, which results in the previous value being saved rather
than the desired one. This correctly handles the change in setting.

add gloabl setting for loglevel

added default section to config load and save

fix proxy and ssl default

add additional settings

update pantalaimon to 0.7.0

add project links to README

set valid url for homeserver

fixes https://todo.sr.ht/~thrrgilag/pantalaimon-ut/3

create config path if it doesn't exist before save

resovles https://todo.sr.ht/~thrrgilag/pantalaimon-ut/2

added about page

updated app icon

updated build instructions and fixed spelling

remove unused imports