Add icon files with correct dimensions to fix electron-builder fail for linux deb package. Requires minimum size of 512x512. (see https://www.electron.build/icons)

build caches and portable package names

* added install stage in appveyor

* added install stage in appveyor2

* packaging for Windows

* configure appveyor file for windows packaging

* modify daemon path

Add transaction fee to send confirmation

Update to Angular 5, prepare for electron-builder

Switch to cancel button

Add mnemonic verification, switch to blue logo everywhere 

* Fixed a the name query parameter for API call wallet/general-info

The name query parameter was incorrectly "walletName".
Also added a example request and response.

* Unified formatting, wallet names, wallet passwords

Unified formatting, wallet names, wallet passwords and request ports

* wallet/create API fix

Fixed the wallet/create API description and example.

* Changed the deprecated /wallet/sensitive API to /wallet/extpubkey

Changed the deprecated /wallet/sensitive API to /wallet/extpubkey. Sensitive is no longer available.

* /wallet/extpubkey example URL fix

/wallet/extpubkey example URL fix: the default account name contains a space (unfortunately)