Fully Updated Landing Box and Interaction Viewer

[logmosier]

I made a branch and merged all the changes I had that where waiting for PRs into 1 branch. There is no need to merge PR #608 if we merge this.
Changes in this PR as a full are:

• Support case where user enters more than 1 recognized gene with both the landing box and interaction viewer (issue Multi-gene searches #520)
• Move away from uniprot dependency to support wider range of genes by changing database used by landing box (issue Enable landing page/info box to accommodate other referring biological databases  #574).
• Refactor landing box into separate component (issue Refactor landing box into separate component #627)

Changes to interactions/index.js:

• All networkMetadata now fetched by ServerAPI. getGeneInformation
• Only trim the network if the number of found ids = to the number of quired genes (this stops the case where the quried gene may be removed by trimming)
• findId() removed and changes to parse are because ids are now found in ServerAPI. getGeneInformation
• Add message when no network is found (sometimes PathsBetween does not return a network)

Changes to search/index.js:

• Removed code dealing with the landing box

Changes to search/landing.js (apart from creating it):

• logic of getLandingResult() changed to handle NCBI database
  • get database ids of genes searched ( all but ENTREZGENE_ACC are just used for links)->merge all the ids in to a easy to use object-> if there are ids get gene information from NCBI with ENTREZGENE_ACC-> format the returned content into a easy to use object
• handelShowMoreClick and expandableText added to cut down on repeated code
• landing box no longer handles extraction of useful bits from fetched data (handled by getLandingResults)