Add StillImage Host Class Driver functions for opening and closing sessions. Ensure IsActive is set on the interface to allow device functions to run.

Fix spelling of "Received" in all source files where it is misspelt "Recieved".

LUFA/ManPages/ChangeLog.txt

@@ -490,7 +490,7 @@
   *  - CDC demos now send empty packets after sending a full one to prevent buffering issues on the host
   *  - Updated demo descriptors to use VID/PID values donated by Atmel
   *  - Added DoxyGen documentation to the source files
-  *  - Fixed Serial_IsCharRecieved() definition, was previously reversed
+  *  - Fixed Serial_IsCharReceived() definition, was previously reversed
   *  - Removed separate USB_Descriptor_Language_t descriptor, USB_Descriptor_String_t is used instead
   *  - Removed unused Device Qualifier descriptor structure
   *  - Renamed the USB_CreateEndpoints event to the more appropriate USB_ConfigurationChanged

LUFA/ManPages/FutureChanges.txt

@@ -13,7 +13,6 @@
   *
   *  <b>Targeted for This Release:</b>
   *  - Finish HID and Still Image Host Mode Class Drivers, add demo summaries
-  *  - Add overviews of each of the officially supported boards to the manual
   *  - Re-add in flip, flip-ee, dfu and dfu-ee targets to project makefiles
   *  - Add in new invalid event hook check targets to project makefiles
   *  - Fix allowable F_CPU values comment in project makefiles

LUFA/ManPages/MigrationInformation.txt

@@ -243,7 +243,7 @@
  *      as it is neither a full nor a standards compliant implementation.
  *
  *  <b>Non-USB Library Components</b>
- *    - The Serial_IsCharRecieved() macro has been changed to the correct spelling of Serial_IsCharReceived() in Serial.h.
+ *    - The Serial_IsCharReceived() macro has been changed to the correct spelling of Serial_IsCharReceived() in Serial.h.
  *
  *  <b>Device Mode</b>
  *    - The MANUAL_PLL_CONTROL compile time token has been removed, and replaced with a USB_OPT_MANUAL_PLL mask