Update Travis to use CMake
Update Travis to use CMake

Change-Id: I65c5e43d7621754d8d051a25bedb48333fea8d5b
Reviewed-on: http://review.couchbase.org/43531
Tested-by: Mark Nunberg <e7d42768707bf23038325b0b68d4b577e5f6064a@haskalah.org>
Reviewed-by: Brett Lawson <c8c4369773d7d7226e031f0c4af62e3f38a08510@gmail.com>

kojiromike/libcouchbase,senthilkumaranb/libcouchbase,mody/libcouchbase,PureSwift/libcouchbase,couchbase/libcouchbase,PureSwift/libcouchbase,avsej/libcouchbase,mody/libcouchbase,mnunberg/libcouchbase,avsej/libcouchbase,mnunberg/libcouchbase,senthilkumaranb/libcouchbase,couchbase/libcouchbase,avsej/libcouchbase,kojiromike/libcouchbase,couchbase/libcouchbase,couchbase/libcouchbase,signmotion/libcouchbase,PureSwift/libcouchbase,maxim-ky/libcouchbase,avsej/libcouchbase,signmotion/libcouchbase,kojiromike/libcouchbase,kojiromike/libcouchbase,couchbase/libcouchbase,couchbase/libcouchbase,mnunberg/libcouchbase,maxim-ky/libcouchbase,maxim-ky/libcouchbase,mnunberg/libcouchbase,mnunberg/libcouchbase,mody/libcouchbase,signmotion/libcouchbase,avsej/libcouchbase,senthilkumaranb/libcouchbase,senthilkumaranb/libcouchbase,mody/libcouchbase,signmotion/libcouchbase,couchbase/libcouchbase,maxim-ky/libcouchbase,PureSwift/libcouchbase,avsej/libcouchbase,avsej/libcouchbase