ExtJS JavaScript Framework gitignore

Added gitignore for Sencha ExtJS, a complete web app framework
http://www.sencha.com/products/extjs/

ExtJS.gitignore

+# build directory for Sencha (ExtJS) projects
+build/
+
+
+# bootstrap files are for development only,
+# and autogenerated on app build.
+# You should build your project after every
+# clone, checkout, merge, etc. To enshure using the
+# last version of the theme an to include paths to required sources
+
+bootstrap.js
+bootstrap.css
\ No newline at end of file