shinycssloaders v1.1.0

• Add showSpinner() and hideSpinner() that allow you to manually trigger the spinner (#56)
• Add support for full-page spinner that covers the entire page using showPageSpinner() and hidePageSpinner() (#42)
• Add support for Rmarkdown documents (#8)
• Add support for setting global options for most parameters (#78)
• Add caption argument to allow showing a message under the spinner (#28)
• Fix page sometimes wobbling because of hidden spinner (#54)
• Fix bug where shiny::tagList() would throw an error (#73)
• Fix bug where using an image spinner would cause the Shiny output to be centered (#79)
• Add more informative error messages (#69)
• Replace addResourcePath() with htmlDependency() which is more robust (#75)