- Implementation is heavily based on existing "LDAP browser" plugin
  by Attila Majoros.
- Added tool window with LDAP server connections and allow
  browsing them in a tree view.
- Connections are stored per each IDEA project.
- Allow LDAP Entry modification through custom file editor.
  Attributes with all values are displayed in table and values
  can be modified or removed (not yet added).
- Handled many little annoyances in GUI from original code.
- Allow Entry or Entry with sub-tree export to LDIF file
  (opened in editor).
- Set license to MIT as we re-use existing code.
- Re-use platform icons where possible.

- For now we don't perform any schema operations or schema checks
  on client side.
- For now single base is allowed per LDAP server connection.