Merge pull request #3 from ksrikanthcnc/master

change in attribute name

Update README.md

Update README.md

Update README.md

improved scheduler and avoid multiple unintentional wallpaper downloads.

fixed multiple wallpaper downloads in a single go.

Updated checkbox label for better understandability

removed debugging information from the function 'applyKeywordWallpaper'

Fixed minor tooltip issue, removed a few white spaces, and moved inpage css to app.css file.

Implemented option 'change wallpaper on startup. Added a filter to search online wallpapers with search-keywords and optional screen resolution constraints to narrow-down wallpaper search results. Added warning messages and avoid a copule of possible exceptions when download path is not available, etc.

Added help messages to the empty area where wallpapers appear. Removed default download folder. Added warning message to suggest user to select download folder/directory in order to support multiple platforms and avoid permissions problems. Updated code to sync code changes with latest electron IPC Main/renderer processes. and other minor adjustments in html and stylesheets.

Added a welcome message, disabled the about modal popup which was previously shows on every startup.

Refined UI for the minimum allowed width and fixed form views in the modal popup tab controls. Handled a scenario when all filters are disabled.

Updated UI with the scheduler using play/pause icon including bootstrap tooltip and updated all packages.