add write support

[gesellix]

this feature is being implemented in the write-support branch.

use cases:

• add a group/subgroup to the selected group
• add an entry to the selected group
• modify an existing entry
• modify an existing group
• sort groups
• sort entries

probably necessary:

• authentication, preferrably using jwt. see https://github.com/auth0/angular-jwt and https://github.com/auth0/express-jwt and the blog post at https://auth0.com/blog/2014/10/01/handling-jwts-on-angular-is-finally-easier/ for possible solutions.

[sercheo87]

Reading key file , now exercise with data base keepass version 2 because not decrypted.

[gesellix]

@sercheo87 can you rephrase, please? I don't perfectly understand what you meant. Would you like key file support to be added? What do you mean with "... because not decrypted."?
Please also consider to file a new issue if your issue isn't only about adding write support.