add friendly error message when the git python module can't be found

also hides the exception
Merge pull request #47 from jokajak/gitCheck

add friendly error message when the git python module can't be found
Updated build script to handle 'checksum' target

The build script can now be invoked, for example, with the following options:
> ./scripts/build checksum --frontend beta gamma
Fixed an issue on the AES-CTR block mode

The previous version of the CTR encoding was incrementing the counter in a weird way, mixing up data from the previous block.
The current fix can correctly decrypt data encoded with AES-CTR using other libraries/languages (currently tested only with Python).
Removed extra JS libraries no longer used for the mobile version
Aborted attempt to factor out the Crypto library on its own module
Updated mobile prototype
Updated readme
Disabled a debug log
Fixed a bug that would "corrupt" header data when upgrading the crypto version used to process an account data

The problem being that only part of the header section would be re-encrypted, thus ending up with different sections encrypted using different crypto function versions.
And this would break when loading data back on next login.
Updated README
Added instructions on how to do actual development, using the dev-proxy script
Fixed the markup of the README.md file.
Upated links to web site;
added stub for Account Info data.

Updated the links to the main website to match the new content/structure.
The new Account Info is now completely static; will become dynamic as soon as the backend infrastructure will be in place.
Tentative fix for issue #49
Update README.md

I was clueless at first why I'm not redirected to POG when I went to /setup/ . Then I realized that I needed to input my setup_password on the textfield when I inspected the element.
Merge pull request #50 from neilmarion/patch-1

Update README.md
First release of /delta version
Updated /delta

Switched from less to scss. Still no build script to update the final CSS, though.
Added preliminary support for storing account data on browser's local storage for offline viewing. No public backend currently support this feature.