Intel compiler: add -isystem flag under Linux

This makes the SYSTEM keyword work with the Intel compiler
under Linux. AFAIK this is supported neither under Windows nor OSX.

Alex
tests: Add variable expansion tests

There are some corner cases in variable expansion which would be nice to
capture before going and rewriting the variable expansion code.
CMake Nightly Date Stamp
IPO: implemented INTERPROCEDURAL_OPTIMIZATION for gcc (-flto)

Using the IPO specific rule variables in the Ninja generator should
fix intel IPO as well.
Merge topic 'gcc-ipo' into next

31b49654 IPO: implemented INTERPROCEDURAL_OPTIMIZATION for gcc (-flto)
CPackWiX: Add support for CPACK_CREATE_DESKTOP_LINKS
Merge topic 'wix_desktop' into next

b78d74de CPackWiX: Add support for CPACK_CREATE_DESKTOP_LINKS
d5828094 CMake Nightly Date Stamp
CMake Nightly Date Stamp
tests: Add variable expansion tests

There are some corner cases in variable expansion which would be nice to
capture before going and rewriting the variable expansion code.
EVIS: Reimplement using custom parsing code

Much less of a bottle-neck now. Still some edge cases missing though.
ExpandListArguments: Optimize the parser

Insert into a string incrementally instead of using a vector of
characters.
cmCommandArgument*: Remove!

Gone! Today is a happy day :) .
Help: Document SYSTEM treatment of IMPORTED target INTERFACE_INCLUDE_DIRS

Document how the behavior can be controlled.
Help: Add additional hyperlink targets
Merge topic 'extend-docs' into next

d9d5a973 Help: Add additional hyperlink targets
d43d049f Help: Document SYSTEM treatment of IMPORTED target INTERFACE_INCLUDE_DIRS
Extend release notes a bit.
Merge topic 'release-notes-3.0' into next

623ee635 Extend release notes a bit.
Join sentences.
Merge topic 'extend-docs' into next

b2e58fd9 Join sentences.
Help: Document SYSTEM treatment of IMPORTED target INTERFACE_INCLUDE_DIRS

Document how the behavior can be controlled.