Merge branch 'account-number'

update backup page account section

Merge branch 'pr/9'

Merge branch 'pr/8'

Merge branch 'pr/6'

update copyright

move browserify to devDependencies

handle 12 word seeds as well

fix bundle

remove global install of browserify

update dependencies, regenerate messages and bundle, add npm scripts

update package-lock.json to lockfileVersion 3

Merge branch 'pr/2'

fix typo; remove trailing space & two consecutive spaces at the end of file

Add more details regarding the address gap limits