Remove mtune from CFLAGS and correct --with-tune on GCC
Merge pull request #113 from Alexpux/develop

Rebase to master an fix for mtune
Remove invalid parts of COMMON_CFLAGS and COMMON_LDFLAGS
Refactoring zlib install procedure
Add zlib part to COMMON_CFLAGS and COMMON_LDFLAGS.
Fix whitespaces.
Exclude to copy zlib1.dll
Switch to new compiler some later
Fix braces
Merge pull request #114 from Alexpux/develop

Fix building with zlib
Add zlib flags for every build iteration
Export variable that define windows-style directory of installed zlib. It's need for Python
Correcting GDB configure flags
Correct Python build flags to find installed zlib
Use static zlib
Remove copy zlib1.dll from gcc-post as we use static zlib
Merge pull request #116 from Alexpux/develop

Fix building with zlib
Update year in copyright notice
Update tcl/tk to 8.6.0
Update year in copyright notice. Part 2
Merge pull request #117 from Alexpux/develop

Update year in copyright notice