Created  the read, update and delete forms for the Modules model. Reused code wherever possible. 

Brought these forms into line with bootsrap standards.

Added two new dropdown menus to the navigation bar, one allows the creation/viewing of book, the other the creation/viewing of modules.

Added the "well" class to both update forms, as I missed this out first time through. 

Fixed some general spelling/syntax mistakes on navigation bar and books model forms.