Fix web_wallet build instructions for qt_wallet

NPM dependencies should be installed within the web_wallet directory and
not the qt_wallet directory. Must change to web_wallet directory before
executing NPM install commands.

I didn't have to set paths since I used the prebuilt dependency package
which came with QT and setenv set up the QT paths for me already.
Add cd command as code decleration
Merge pull request #43 from sidhujag/master

Update qt_wallet build instructions
Update web UI. Also, load page changes in web UI via javascript rather
than reloads where possible.
Merge branch 'develop' of github.com:BitShares/qt_wallet into develop
Fix build after a certain Rajkumar removed a macro Qt Wallet uses
Merge branch 'develop'
Merge pull request #6 from vikramrajkumar/master

merge latest