Fix typo in manual
Fix typo, s/verison/version/
Add a check for the VC++ 2012-style 64-bit path.
In VS2012 the path to the 64-bit tools has changed to
VCINSTALLDIR\bin\x86_amd64\cl.exe. This change will make the bootstrap
check there to see if it exists before falling back to the old amd64 path.
Bring in declaration of atoi

./bootstrap.py fails on some platforms without this include
Merge pull request #514 from dabrahams/patch-1

Bring in declaration of atoi
Merge pull request #504 from benvanik/master

Add a check for the VC++ 2012-style 64-bit path.
Merge pull request #503 from mo/fix_typo_20130219

Fix typo, s/verison/version/
Merge pull request #499 from lht/patch-1

Fix typo in manual