[CORE-1343] Fix relative path and catch UnknownChangelogFormatException
CORE-1477 Support overriding LockService changeLogWaitTime
Removed unneded duplicate entries in .gitignore
Handle potential NPE
include column size unit
Added start value and increment for sequences
fix uniqueness and column expressions for oracle
Fixed issues introduced in recent pull request merges found by failing tests
CORE-1158 Escaping of reserved keywords in HSQLDB
Merge pull request #141 from lguerrin/3.0.x

[CORE-1343] Fix relative path and catch UnknownChangelogFormatException
Merge branch '3.0.x'

Conflicts:
	liquibase-core/src/main/java/liquibase/Liquibase.java
Merge remote-tracking branch 'origin/master'