If there are only prereleases we should just take these
Bump version to 0.17.1
introduce LockFile.Create method
extract same update functionality into a function
reorder parameters for better chaining
Find ProjectFile in upper directories
Don't go higher as the dependencies file when we look for  references file
We only fix the package dependencies for non-related packages during selective UpdateProcess
Don't recompute all dependencies on every lookup
Merge pull request #403 from theimowski/master

clear failure message for simplify, when lock file outdated
Merge pull request #406 from mexx/refactorings

some refactorings
RELEASE_NOTES
RELEASE_NOTES
Bump version to 0.17.3
Merge branch 'master' into update

Conflicts:
	src/Paket.Core/LockFile.fs
	src/Paket.Core/UpdateProcess.fs
Merge branch 'Reffind'
Merge pull request #409 from fsprojects/Reffind

Find the references file in upper directories
decode uri on createRelativePath
unescape extracted file names from nupkg - references #411
Merge pull request #410 from fsprojects/update

Selective update should only update dependent packages