Add Remarkable app

apps/Remarkable/credits

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+Added to Pi-Apps by Itai-Nelken.

apps/Remarkable/description

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+A fully featured Markdown editor for Linux.
+Remarkable has many features including:
+- Live Preview with Synchronized Scrolling
+- Syntax Highlighting
+- GitHub Flavored Markdown Support
+- HTML and PDF Export
+- Dialogs for adding images, links and tables
+- Styles
+- Custom CSS Support
+- Keyboard Shortcuts

apps/Remarkable/install

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+#!/bin/bash
+
+DIRECTORY="$(dirname "$(dirname "$( cd "$(dirname "$0")" >/dev/null 2>&1 ; pwd -P )")")"
+
+function error {
+  echo -e "\\e[91m$1\\e[39m"
+  exit 1
+}
+
+wget https://remarkableapp.github.io/files/remarkable_1.87_all.deb || error 'Failed to Download!'
+
+sudo apt --fix-broken -y install ./remarkable_1.87_all.deb || error 'Failed to install!'
+rm remarkable_1.87_all.deb

apps/Remarkable/uninstall

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+#!/bin/bash
+
+DIRECTORY="$(dirname "$(dirname "$( cd "$(dirname "$0")" >/dev/null 2>&1 ; pwd -P )")")"
+
+function error {
+  echo -e "\\e[91m$1\\e[39m"
+  exit 1
+}
+
+sudo apt purge remarkable -y || error "Failed to purge remarkable package!"
+sudo apt autoremove -y

apps/Remarkable/website

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+https://remarkableapp.github.io/index.html