Added shortcodes
* row
* well
* col1 - col12
* col_xs_1 .. col_xs_12
* col_sm_1 .. col_sm_12
* col_md_1 .. col_md_12
* col_lg_1 .. col_lg_12

Usage examples

[row class="class name"]Row Content[/row]
[well class="class name"]Well Content[/well]
[col4 class="col-sm-6"]Col Content[/col4]