Event loop

Signed-off-by: leo-ma <begeekmyfriend@gmail.com>
Remove something wrong left

Signed-off-by: leo-ma <begeekmyfriend@gmail.com>
Add evloop option for compilation

Signed-off-by: leo-ma <begeekmyfriend@gmail.com>
Add custom testing in compilation for built-in event loop

Signed-off-by: leo-ma <begeekmyfriend@gmail.com>
Fix spelling bug

Signed-off-by: leo-ma <begeekmyfriend@gmail.com>
Fix some bug

Signed-off-by: leo-ma <begeekmyfriend@gmail.com>
Merge pull request #45 from leo-ma/core_dir

Added built-in event loop implementation.

- travis-ci updated.
- configure code updated.