Sibl-gui

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- Fixed incorrect lights colors handling in Templates.

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- Update Lightsmith Templates to support latest Lightsmith Ibl Sets.

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- Ported **Maya_MR_Standard** Template code to Python.
- Ported **Maya_VRay_Standard** Template code to Python.
- Ported **Maya_VRay_Dome_Light** Template code to Python.
- Ported **Maya_RfM_Standard** Template code to Python.
- Ported **Maya_MR_Lightsmith** Template code to Python.
- Ported **Maya_VRay_Lightsmith** Template code to Python.
- Refactored 3dsMax and Softimage / XSI Templates.
- Most Templates now have a prefix attribute exposed allowing customization of the scene setup.
- Updated documentations / help files.

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- Updated **sIBL_GUI** Help / Manual.
- Improved Collection ListWidget ToolTips with Shot Time.
- Refinements in **sIBL_GUI** UI.
- Line Edits are not cropping their content anymore on Mac Os X.
- Changed the About Tab with Links Support, etc.
- An option is now available in Preferences to Ignore Missing Templates so you are not spammed with Templates you don't have locally.

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- Updated **sIBL_GUI** Help / Manual.
- Tweaked the OsWalker so it correctly return files with multiple **.** in their name.
- Splashscreen now stays on top of other windows.

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- Templates names have been changed.
- A Splashscreen is now showing on initialization.
- **sIBL_GUI** FTP Code has been slightly tweaked.
- **sIBL_GUI_Updater** is now also checking for Templates releases. This release makes 1.4.X update mechanism obsolete.
- Catched an exception when the Logging File is deleted while **sIBL_GUI** write into it.
- Refinements in **sIBL_GUI** UI.
- I wanted **sIBL_GUI** next stable release to be a 1.5, but since we are introducing the sIBL V2 File Format, I'm jumping the release numbers closer to 2.0.