Add 'install' option (currently only available for native build).

Also enhance FindUrho3D.cmake module to find Urho3D library in the Urho3D SDK installation location.
Fix URHO3D_INCLUDE_DIR to also include sub-dirs to 3rd-party headers.
Prevent spamming stderr stream when log file could not be opened.

This occurs when the binary is installed and executed in a filesystem where user does not have write permissions.
Fixed AngelScript assert/crash if void value is attempted to be cast explicitly. Closes #33.
Official fix for the void assert from AngelScript SVN.
Rephrase error message when Urho3D library is not found.
Reduce 3rd-party headers installation to as minimum as possible.
Add 'install' option for cross-compiling build and IOS as well.

Note: there is a known bug in CMake/Xcode generator that prevents iOS targets (library and bundle) to be installed correctly (see http://public.kitware.com/Bug/bug_relationship_graph.php?bug_id=12506&graph=dependency).
Reinstate comment on RedHat-based system that needs LIB_SUFFIX.
Add more git ignore patterns for Mac OS X platform.
Add condition to turn off the temporary fix on CMake 2.8.12.

CMake/Xcode v2.8.12 appears to have fixed the iOS auto-linking issue. Tested on Xcode 5.
Temporary fix to work around Xcode generator bug for target installation.
Rename Urho3D script host app from "Urho3D" to "Urho3DPlayer".
Change the scripts to use the new player name.
Moved Urho3DPlayer class definition to a .h file. Updated documentation to refer to Urho3DPlayer.
Document how to install library and how to find it from installed SDK.
Setup Android template directory for both Windows and non-Windows.
Revert "Setup Android template directory for both Windows and non-Windows."

This reverts commit 06f7d73922f858b2c45bffcfdd7f602b8a9056a0.
Fix the destination template dir for GCC only.

Android build on Windows platform should also use the same template location installed in the NDK or standalone toolchain.
Fixed Android file access from within the .apk.