fix(core): fix Gulp file
feat(core): main structure of the client
chore(core): remove useless npm scripts
fix(test): fix wrong test order
feat(core): core of the client library
fix(core): remove unused dependencies
fix(core): improve style
fix(core): improve Gulpfile
fix(gulp): status image bug fix
fix(test): remove gulp.watch() from tests
feat(core): implement core methods
fic(core): add debug file support
fix(core): add comments