Add support for reset button callback function

1. add support for reset button callback function; fixed #46
2. update config of build;
3. update docs

Fix warnings with Vue v2.5.11

Fix warnings with Vue v2.5.11

Support fuzzy search for `local` data

• Support fuzzy search for local data

WOW! I just release v0.4.15

Fix bug when using el-date-picker Element v2.x

In Element v2.x, el-date-picker's event:change has an array of two date as the first argument. This is different from Element v1.x, this event:change has a display value of string as the first argument. Now it is fixed.

Remove warning message when using el-table in Element v2.x

In Element v2.x, event:expand has been renamed to event:expand-change. If use event:expand, it throws a warning message: Remove the warning message:

[Element Migrating][ElTable][Event]: expand is renamed to expand-change

Now, the warning message will not be shown on el-search-table-pagination v0.4.15 .