atom: Add version 1.8.0

Wanted by Peter Arndt [1].

> Atom is a text editor that's modern, approachable, yet hackable to the
> core—a tool you can customize to do anything but also use productively
> without ever touching a config file.

Create a versionless bee file, by running the command below and adapting
the output.

```
$ bee init https://github.com/atom/atom/archive/v1.8.0.tar.gz
creating v1.8.0-0-0.bee from template '/etc/default/bee/templates/fallback'
```

Adapt `mee_build()` and `mee_install()` according to the build
instructions [3].

Report issue #12151 [4] regarding the location of the Node.js modules
directory.

[1] Atom Editor (07/12/16 10:39, Peter Arndt)
[2] https://atom.io/
[3] https://github.com/atom/atom/blob/master/docs/build-instructions/linux.md
[4] https://github.com/atom/atom/issues/12151

atom.be0

@@ -0,0 +1,86 @@
+#!/usr/bin/env beesh
+
+# BEE_VERSION atom-1.8.0-0
+
+## this file was created by bee init and should be executed to build a
+## bee-package. (Additional hints are located at the end of this file.)
+
+###############################################################################
+## The source URL(s) define the location of the sources that will be
+## downloaded. Version variables may be used to simplify reuse of this bee-file.
+
+SRCURL[0]="https://github.com/atom/atom/archive/v${PKGVERSION}.tar.gz"
+
+###############################################################################
+## Add URLs/pathes to patch files to the PATCHURL array.
+## The sources will be patched in the order of the array.
+
+# PATCHURL+=()
+
+###############################################################################
+## Add filename patterns to the EXCLUDE array of files that should not
+## be added to you package but may be present in the image directory.
+
+# EXCLUDE+=()
+
+###############################################################################
+## Uncomment the next statement, if the software may not be able to be build
+## outside the source directory and need to be build inside the source
+## directory.
+
+# build_in_sourcedir
+
+###############################################################################
+## bee cannot detect buildtypes specified in subdirectories.
+## Sometimes packages "hide" the real sources in a subdirectory named
+## 'src' or 'cmake' or ..
+## use 'sourcesubdir_append' to specify this directory if known.
+
+# sourcesubdir_append src
+
+
+###############################################################################
+## Change the default (auto-detected) steps to
+## extract, patch, configure/setup, build and install the software.
+## Make sure the mee_install function does install everything to the
+## image directory "${D}"
+
+#mee_extract() {
+#    bee_extract "${@}"
+#}
+
+#mee_patch() {
+#    bee_patch "${@}"
+#}
+
+#mee_configure() {
+#    bee_configure
+#}
+
+mee_build() {
+    start_cmd "${S}"/script/build --build-dir "${B}"
+}
+
+mee_install() {
+    ln -s "${S}"/build "${B}"/build
+    start_cmd "${S}"/script/grunt install --build-dir "${B}" --install-dir "${D}"/"${PREFIX}"
+}
+## by default this may be 'make install DESTDIR="${D}"'
+
+###############################################################################
+##
+## Additional hints:
+##
+## The name of this bee-file should follow the following naming convention:
+##     pkgname-pkgversion-pkgrevision.bee
+##
+## You may remove all comments as long as SRCURL[${PKGVERSION}] is set.
+##
+## Everything in this file will be executed in a bash environment.
+##
+## Build the package by executing
+##     './pkg-version-N.bee' or
+##     'beesh ./pkg-version-N.bee'
+##
+## see http://beezinga.org/
+##