Fixed an error when creating a new problem set in the Library Options side pane.
Initial rearranging of files in the library browser.
Redoing some of the library browser views to simplify the code.
Fixes a problem where subj/chapter/section names have a ' or a / in the name.
Changes to the LibraryView subclasses when loading problems.
Updated a testing file.
Changed the "Select..." in each library tab to something more relevant.
Cleaned up the code for the Local Library Browser.
Disallowed user from selecting top level of library when pulling problems.
Improvements to CSS styling in the library browser.
Fixed bug in which a problem could not be added to a set via the Add to Target Set.
Cleanup of the side pane CSS.
Highlights problems in viewed problems in the library that are also in the target problem set.
Added a title (tooltip) to the target set button.
Merge branch 'ww3' of https://github.com/openwebwork/webwork2 into ww3-feature/library-fixes

Conflicts:
	webwork3/public/js/apps/CourseManager/main-views/LibraryBrowser.js
	webwork3/public/js/apps/CourseManager/option-panes/LibraryOptionsView.js
	webwork3/public/js/views/SidePane.js
Added webwork3/logs
Some files that changed when a merge with ww3.
Fixed a couple of error which arose on the merge with ww3.
Merge branch 'ww3' of https://github.com/openwebwork/webwork2 into ww3-feature/library-fixes
Fixes to showing errors when trying to load the entire library as well as when new problem sets are created.