Merge pull request #342 from theimowski/master

quick fick for Convert-from-nuget & Init-auto-restore
RELEASE_NOTES
Use public api, move functions into public api

Need review on:

* Should these be public APIs?
* What should be done with bool flags?
introduce constant for paket-files folder
use constant for paket.dependencies file
introduce constant for FULLPROJECT source file name
Merge pull request #344 from mexx/introduce-constants

introduce constants
extract function for github raw url
fix typo
remove unused method
reuse utility method
remove unnecessary ToString conversion
Trailing whitespace is ignored in paket.references
Cleaning the computation of the ReferencesFile
reading Nuget pass, cleanup
added CredsMigration DU
saving migrated credentials
cleanup - extract GetAllPackageSources member
Cleanup - Moved ParseAuth member to PackageSources module
Cleanup - extract packagesource parsing to the dedicated module