Database import/export integration
Merge branch 'develop'
SQLite Database Input/Output initial state
Merge pull request #16 from AlexSmirnow/develop

SQLite Database Input/Output initial state
Import from Excel
Merge pull request #17 from ladagagina/master

Import from Excel
Merge branch 'develop' of https://github.com/Alllex/Schedule.git
Merge branch 'develop'