Merge branch 'master' into esasocis-2012-satellites
SatellitesPlugin: Add plugin activation tab page in config dialog

This adds a new tab page to the config dialog that is shown if the plugin
is not active. All other tab pages are hidden in this case. The user can
click a button to activate the plugin. If he or she do this, the plugin
configuration tab pages show up. This avoids confusion with empty catalog
lists. These lists are only available if the plugin is activated.
SatellitesPlugin: Remove unused code that slipped in by accident
Merge remote-tracking branch 'origin/master' into esasocis-2012-satellites
SatellitesPlugin: Improve 'plugin inactive' mode of configuration dialog
SatellitesPlugin: Show yellow orbits
reduce number of places where the bbox needs to be marked as dirty
rename PlacemarkLayout::visiblePlacemarks() to ~::visibleTiles() and have it return a QSet of TileIds
- Minor constellation line "fixes"
Minor constellation line fix.
Add first step towards colors in the Marble stars plugin.
Colors are determined via the B-V color-index.
The color scheme chosen is not supposed to be overly
colorful but just tries to reflect the actual visible colors of the stars.
fix plugins
Bookmarks: fix nested folders and visibility toggle
PopupMenu: add bookmark more important than copy coordinates
Several compiler warningy fixes

Submitted by Geoffrey Mon <geofbot@gmail.com>, completing
a Google Code-in task.

CCMAIL: geofbot@gmail.com
REVIEW: 107959
DIGEST: Google Code-in contribution
Some southern constellations have been added

Reticulum, Corona Australis, Lupus, Crater, Ara, Telescopium
- Awesome work by Timothy Lanzi: Render stars as pixmaps
- Minor constellation line fix (Sgr Gam1 vs. Gam2)
- Constellations along Eridanus created by zbirnholz1 during gci 2012.
- Fixing Spring Equinox bright star: Ignore novae and Dsos