install: add pvcam support

pvcam only config (and also clara only version)
gui: Added ImageToggleButton to XRCed editor
Merge branch 'master' of 192.168.92.5:odemis
gui: added view button images
gui: small bug fix concerning attribute declaration in the wx.App class
pvcam: very small bugfixes/ improvements
pvcam: add explicit shutter mode
Merge branch 'master' of vpn.delmic.com:odemis
gui: tool button Photoshop document
Merge branch 'master' of 192.168.92.5:odemis
gui: Secom view tools button images
gui: added tool menu buttons
gui: first draft of selection tool
pvcam: add symlink to udev, to avoid mixing st133 and pixis
pvcam: allow to identify the device by its name
Merge branch 'master' of vpn.delmic.com:odemis
spectrapro: beginning of conversion polynomial for postion to wavelength

API
detect focal length

+ refactor drivers to share the getSerialDriver function
pvcam: detect cameras without binning

try to restore better the acquisition thread if it died unexcpectedly
driver: share improvement on restarting the acquisition thread
Merge branch 'master' of vpn.delmic.com:odemis