Translation update

Signed-off-by: Werner Macho <werner.macho@gmail.com>
translation update

Signed-off-by: Werner Macho <werner.macho@gmail.com>
added new link to springer book
Adding PyCharm to developer page

Signed-off-by: Werner Macho <werner.macho@gmail.com>
:erge remote-tracking branch 'upstream/develop' into develop
stylistic and language edits
minor style edits
minor style edits
formatting fix
minor edits
minor style edits and update from potlatch to iD editor
minor style/content edits; change heading style and adding in refs