Add: Customer Management
Bug: Project Overview, abort button in edit form is working now
Bug: Projekt Overview, if edit form is not saved an you click on new
project, the project add form is shown now
Enhancement: switch the names of the customer_assigned table rows to the
project name scheme
just added the alter table sql
Merge pull request #14 from Lioxen/master

tentavely merged for 1.1 
needs thorough testing and refactoring , though (see comment)