[resources] updated encrytion handshake sound (Julian, Niki)

 * This fixes issue #112.
[CreateAccountActivity] updated sms text with replacement string (Dennis, Ben)

  * This fixes issue #59.
[CallActivity] updated verify authentication token text (Andi, Dennis)

  * This is part of issue #94.
[resources] added verify sas ok and cancel icons

  * This is part of issue #94.
[CallActivity] verify sas styling (Dennis, Ben)

  * This fixes issue #94.
[CallActivity] xml: inner side margin of 5dp everywhere
Merge pull request #116 from simlar/encryption-sound-sms-callactivity-improvements-pullrequest

EncryptionSound, sms and CallActivity improvements Pullrequest