Prevent Dust compile errors from crashing grits in watch mode

[vmadman]

(  dust.manager.error               ) A CRITICAL ERROR HAS OCCURRED:
(  dust.manager.error               )
(  dust.manager.error               ) Dust Compilation Failure:
(  dust.manager.error               )  -> Template Name: development/guides/project/creating-a-project
(  dust.manager.error               )
(  dust.manager.error               ) Expected end tag for imarkup but it was not found. At line : 13, column : 15
(  dust.manager.error               )
(  dust.manager.error               ) Stack Trace:
(  dust.manager.error               )     at defaultConstructor._doDustCompilation (/project/node_modules/grits/lib/classes/ext/dust-manager.js:794:19)
(  dust.manager.error               )     at defaultConstructor.compileString (/project/node_modules/grits/lib/classes/ext/dust-manager.js:505:23)
(  dust.manager.error               )     at defaultConstructor.compileOne (/project/node_modules/grits/lib/classes/ext/dust-manager.js:411:8)
(  dust.manager.error               )     at defaultConstructor._compileOneContentFile (/project/node_modules/grits/lib/classes/ext/dust-manager.js:360:8)
(  dust.manager.error               )     at eachResourceWrapperFn (/project/node_modules/grits/lib/classes/resource-path-collection.js:763:18)
(  dust.manager.error               )     at /project/node_modules/grits/node_modules/lodash/lodash.js:3925:15
(  dust.manager.error               )     at baseForOwn (/project/node_modules/grits/node_modules/lodash/lodash.js:2521:24)
(  dust.manager.error               )     at /project/node_modules/grits/node_modules/lodash/lodash.js:3894:18
(  dust.manager.error               )     at Function.forEach (/project/node_modules/grits/node_modules/lodash/lodash.js:7483:11)
(  dust.manager.error               )     at onResourcesScanned (/project/node_modules/grits/lib/classes/resource-path-collection.js:761:9)
(  dust.manager.error               )     at tryCatcher (/project/node_modules/bluebird/js/release/util.js:11:23)
(  dust.manager.error               )     at Promise._settlePromiseFromHandler (/project/node_modules/bluebird/js/release/promise.js:489:31)
(  dust.manager.error               )     at Promise._settlePromise (/project/node_modules/bluebird/js/release/promise.js:546:18)
(  dust.manager.error               )     at Promise._settlePromise0 (/project/node_modules/bluebird/js/release/promise.js:591:10)
(  dust.manager.error               )     at Promise._settlePromises (/project/node_modules/bluebird/js/release/promise.js:674:18)
(  dust.manager.error               )     at Promise._fulfill (/project/node_modules/bluebird/js/release/promise.js:615:18)
(  dust.manager.error               )
(  dust.manager.error               ) -~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-
(  dust.manager.error               )
(  dust.manager.error               )
(  render.fail                      ) The Grits render operation has failed and will exit..