ci: Add a Travis configuration

This fixes #5.
Merge pull request #11 from Cangjians/travis

ci: Add a Travis configuration
Add Visual Studio ignore list
Add libcangjie2 Visual Studio project skeleton
Add sqlite3
libcangjie2 add reference sqlite3
Add the files to libcangjie2 project
Add libcangjie2_dbbuilder
Add libcangjie2_cli
Add libcangjie2_bench
Add test_cangjie
Add test_cangjiechar
Add test_cangjiecharlist