Add CLI command to get and put JBrowse config files in collaboration server

[shashankbrgowda]

Fixes #433, fixed #214

Example:

apollo-cli % yarn dev jbrowse get-config --profile apollo > config.json

apollo-cli % jbrowse add-track https://ftp.ebi.ac.uk/pub/databases/havana/ngs_havana/CLS/updated_master_table/human/pacBioSII-Cshl-CapTrap_HpreCap_0+_Brain03Rep1.bam --indexFile https://ftp.ebi.ac.uk/pub/databases/havana/ngs_havana/CLS/updated_master_table/human/pacBioSII-Cshl-CapTrap_HpreCap_0+_Brain03Rep1.bam.bai --assemblyNames=66bb60e83db15a4a2aff224d
Added track with name "pacBioSII-Cshl-CapTrap_HpreCap_0+_Brain03Rep1" and trackId "pacBioSII-Cshl-CapTrap_HpreCap_0+_Brain03Rep1" to ./config.json

apollo-cli % yarn dev jbrowse set-config --profile apollo config.json
Jbrowse configuartion added successfully to apollo