Possibility to copy gc-code and cache name

Added possibility to long-click on cache name or gc-code to copy (or share)
those strings.
Change log update master

- Completed change log
- Removed item which is already in release
- Properly escaped special characters
- First letter should be capital also in english
Merge pull request #2398 from Lineflyer/master

Change log update and correction
Missing german translation
Merge pull request #2401 from Lineflyer/master

Another missing german translation
Use XML serializer to generate proper XML

Do not cook up XML by hand when proper methods exist.
Fix XML schema location

One extra element had been introduced during the previous code
conversion to the XML serializer. That could theoritically affect
verifiers.
Czech plurals for remaining time
Merge pull request #2405 from Pitel/patch-1

Czech plurals for remaining time
fix #2404: Remove spaces when editing coordinates
Send message to cacheowner and cachers in logs

Added option to send message to another cacher using the form at gc.com.
Merge pull request #2407 from YraFyra/sendmail

Send message to cacheowner and cachers in logs
Fix #2409 - Limit log text to 4000 characters
Merge pull request #2411 from campbeb/fix2409

Fix #2409 - Limit log text to 4000 characters
Merge pull request #2388 from YraFyra/copystuff

Possibility to copy gc-code and cache name. Fix #1615
Limit TB log to 4000 characters
Limit TB log to 4000 characters
Merge branch 'release' into upstream
fix #2412: login fail with unhelpful message on unvalidated account
Merge branch 'release' into upstream