Work with Orchard 1.7

Modified to work with 1.7. Other changes include:
+ Exclude the _Backup folder, which was created by Orchard to store old
modules
+ Import from code: beside the 'Generate from source' that scans the
whole site, new options were added to generate from a specific module or
theme
+ maybe more, don't remember :P
Create README.md
Merge pull request #34 from pilgylis/master

Added support for Orchard 1.7
(didn't check it myself)
Fixing PAths for msbuild
comment out bad migration
Merge
Fixing some perf issues
Parralize query
Changing Localization to use context accessor