update changelog for v0.12.0
prepare package.json, bower.json for future release v0.13.0
(#57) Styling table: Added new table style (skeletal)
(#57) Changelog
Merge branch 'feature/57-styling-table--add-new-table-style-skeletal'

* feature/57-styling-table--add-new-table-style-skeletal:
  (#57) Changelog
  (#57) Styling table: Added new table style (skeletal)
(#58) Styling table: fixed row selecton is not visible
(#58) Changelog
Merge branch 'feature/58-styling-table--fix-row-selecton-is-not-visible'

* feature/58-styling-table--fix-row-selecton-is-not-visible:
  (#58) Changelog
  (#58) Styling table: fixed row selecton is not visible
(#59) Styling grid: Fixed width of a single col in a row
(#59) Changelog.
Merge branch 'feature/59-styling-grid--fix-width-of-a-single-col-in-a-row'

* feature/59-styling-grid--fix-width-of-a-single-col-in-a-row:
  (#59) Changelog.
  (#59) Styling grid: Fixed width of a single col in a row
(#59) Styling grid: Cleanup
Merge branch 'feature/59-styling-grid--fix-width-of-a-single-col-in-a-row--cleanup'

* feature/59-styling-grid--fix-width-of-a-single-col-in-a-row--cleanup:
  (#59) Styling grid: Cleanup
release v0.13.0
prepare package.json, bower.json for future release v0.14.0
(#61) axButtonList: fixed double click handling with debounce function
(#61) axButtonList: fixed double click handling with debounce function: changelog
Merge branch 'feature/61-ax-button-list-fix-double-click-handling'
(#62) Styling: extend mixin to equal col height for different widths
(#62) Changelog.