adding fixes and additions

for issues #247, #236, #233
updating to 2.0.3
fixing ng namespace.
fixing issue #253
fixing issue # 241
fixing issue #238
moving ng-shows to the same ng-include level.
fixing issue relating to overriding row styles in css
fixing pinning issue

fixing issue where pinning could be bypassed by setting pinned true on
the column definition even when pinning is turned off.
add zh-tw i18n support
Merge pull request #257 from clkao/zh-tw

add zh-tw i18n support
Merge branch 'master' of https://github.com/angular-ui/ng-grid into 2.0.3
adding plugin instances to grid options
adding fix for issue #285
not using ng-include anymore.

added directives for the menu and footer templates instead.
fixing issue #250
fixing issue #264
added enableHighlighting option

fixed grouping bug where the grid couldn't be drag-grouped until after a
digest happend after grid was rendered. fixed minor display issue.
Merge pull request #255 from angular-ui/2.0.3

2.0.3
modified flexible height plugin