Modified extension checking

Removed concept of 'private' extension.  In theory, all extensions are
private if not stored somewhere public (e.g. public GitHub repos).
All extensions will now live in lib/extensions as submodules.  We may
have to edit this script a little more to ensure that everything works everywhere.
Cleaned up manifest parsing

Moved additional operations outside of the try-catch.  They shouldn't
cause errors, but you never know what could eventually end up in there.
Cleaned up a few other constructs

Converted pointless _.reduce statements to use Array.join instead.
Combined a couple of if statements that both checked the same thing.
Cleaned up whitespace in variable declarations
Switched to named functions instead of variable assignment
Fixed path in build_all to point to the correct directory

Extensions now live in lib/extensions and there's only one kind of them
Stylistic updates

Converted variable assignments of anonymous functions to named
functions.
Removed a dangling comma
Whitespace cleanup
Reverted named functions to variable assignments

Apparently, that's a no-no in strict mode...
Fixed some more whitespace while I was at it.
add xcore build script travis
travis init dubmodules recursive
Disregard extensions.
Stubbing database build. Currently breaking.
Fix missing method invocation.
Trying to keep up with xTuple. They no longer use xmla
Merge pull request #8 from pangea/build_travis

Build travis
Use noah's version.
Merge branch 'test_script'
Merge branch 'master' of github.com:pangea/xcore
Change reference to test folder as opposed to tests