added filter, added class Competition, added quote Parser
Merge pull request #7 from MOHAX239/master

added fileters, methods for Roman, methods for Daniil,
Refactoring of database connection code.
More refactoring.
Added singleton, class for application transfer to server.
Merge branch 'master' of git://github.com/anlun/olympIS
Added missed file.
Added new class, deleted using Pair in server.