Added gitlab ci files

8 jobs for CI
Status Job ID Name Coverage
  Test
canceled #426
Linux
clang-c++11-Qt4

00:41:51

passed #430
Linux
clang-c++11-Qt5

00:00:12

passed #428
Linux
clang-c++98-Qt4

00:00:19

passed #432
Linux
clang-c++98-Qt5

00:00:06

canceled #425
Linux
gcc-c++11-Qt4

00:41:50

passed #429
Linux
gcc-c++11-Qt5

00:00:11

passed #427
Linux
gcc-c++98-Qt4

00:00:12

passed #431
Linux
gcc-c++98-Qt5

00:00:04