[s1948] Use proper error files for missing string errors
[s1949] Do more checks if a Player can enter a map On Login

Also please feedback some experience what is supposed to happen in such cases.
[s1950] Correct file version no. in VC110 sln files

Correct the File Version numbers in VC110 solution files so that VS2012
opens correctly on systems that have both VS2010 and VS2012 installed

(based on commit 5895b2b)
Merge branch 'master' of https://github.com/mangosone/server