Update README.md

just a spelling update... btw, what is a carbonated message?
Added question mark to remove_contact_text
Changed "unsuccessful delivery" to "delivery failed"
Merge pull request #157 from kruks23/development

More harcoded translations + updated Spanish
Merge pull request #160 from alethea/development

Spelling and changed "unsuccessful delivery" to "delivery failed"
Merge pull request #153 from 9034725985/patch-1

Update README.md
Disabled the Home button when it's not the Up button
Up button goes to contacts after initial setup
Capitalized openPGP -> OpenPGP
Merge pull request #165 from alethea/openpgp-capitalization

Capitalized openPGP to OpenPGP
fixed regression that led to the wakelock not being released again
Merge pull request #164 from alethea/development

Fix home button up navigation
Merge branch 'development' of github.com:siacs/Conversations into development
Made ConversationActivity singleTask
Refactored into onNavigateUp
Made the navigateUp override behave like a navigate up
Removed TASK_ON_HOME flag from intent created from share
Merge pull request #167 from alethea/up-navigation

Up navigation
OpenPGP key display in muc details is now prettier and linked to openkeychain
show dialog when no contact in a muc has pgp support