Update user help doc
Don't allow leading/trailing spaces in commands.

Trailing or leading whitespaces in commands
cause them to fail. For example "ls  " is an
invalid command. Show an error message to the user
when she tries to save such a command.
Merge pull request #312 from ermauliks/help-doc-changes-removing-license-changes

Update user help doc
Update What's new.
Merge pull request #318 from arvindsv/14_2_whats_new_update

Update What's new.
Merge pull request #314 from sahilm/no-leading-or-trailing-whitespaces-in-commands

Don't allow leading/trailing spaces in commands.
The label gets resolved.

* If a dependency material P1 ({material-P1}) was referred to by current pipeline P0 (with label ${material-P1}) and an upstream material pipeline P2 ({material-P2}, Triangle Dependency), and the order of materials was such that the resolution of material-P2 for the current pipeline happened before the resolution of material-P1, the name of material-P1 for pipeline P0 got changed and the resolution for the current pipeline label failed.

* The material name was getting changed during fan-in resolution. This fix restores the computed material config to actual material config after fan-in graph is generated.