Merge pull request #419 from kazoompa/project-list-tabulated

Implemented a grid view for the project list
Fix some widgets inclusions
Upgrade to gwt-bootstrap 2.3.2.0-obiba with flatly style
Clear search box when leaving project page
Some style fixes
Some style fixes
PMD fix
Geo types added, streamed as strings to R
OPAL-2229 VariableEntitiesHolder limitation removed
OPAL-2227: Add attribute on multiple variables at once
OPAL-2227: Removing redundant JsArrays.toList(JsArrays.toSafeArray)
OPAL-2206 - made sure all pagers are visible only when rows > pager's pageSize
Merge pull request #420 from kazoompa/bug-OPAL-2206

OPAL-2206 - made sure all pagers are visible only when rows > pager's 'page size'
Merge pull request #421 from emorency/OPAL-2227-add-attribute

Opal-2227: Add attribute to multiple variables at once
Style fixes
Merge branch 'dev-yannick'
Fixed categories that were not showing
Merge pull request #422 from emorency/OPAL-2227-add-attribute

Fixed categories that were not showing
OPAL-2227: Reset selection when refreshing the table of variables
Merge pull request #423 from emorency/OPAL-2227-add-attribute

OPAL-2227: Reset selection when refreshing the table of variables